We report measurements and analysis of the specific heat and magnetocaloric effect-induced temperature changes at the phase boundary into the single magnetic field-induced phase (phase II) of U(Ru0.96Rh0.04)2Si2, which yield irreversible properties similar to those at the valence transition of Yb(1-x)Y(x)InCu4. To explain these similarities, we propose a ...
PubMed
Thin films of the half-doped manganite Pr0.5Ca0.5MnO3 were grown on (1 0 0) oriented MgO substrates by pulsed laser deposition technique. In order to study the effect of strain on the magnetic field induced charge order melting, films of different thicknesses were prepared and their properties ...
NASA Astrophysics Data System (ADS)
We report on measurements of magnetic field induced nematic order in the bent-core liquid crystal 4-chlororesorcinol bis[4- (4-n-dodecyloxybenzoyloxy) benzoate]. Using the 31 Tesla solenoid at the National High Magnetic Field Laboratory, we have observed, at temperatures less than one degree above the clearing ...
An analytic response theory formulation for the leading-order magnetic field-induced and field-dependent quadrupole splitting in nuclear magnetic resonance spectra is presented and demonstrated with first-principles calculations for Ne21 , Ar36 , and Kr83 in noble gas atoms. The case of molecules was studied for S33 in the ...
. Likely candidates would be magnetoelastic (ME) and quadrupolar (QP) couplings associated with the 4 that an AF order is stabilized by a uniform field, and that a magnetoelastic distortion with wave vector QA
E-print Network
We determined the magnetic phase diagram of UPd3 with the hexagonal structure. There are three successive phase transitions at 7.5, 6.8 and 4.5 K. This first transition is due to the quadrupolar ordering, which was qualitatively discussed on the basis of the quadrupolar interaction with the order parameter Ozx. The ...
... Accession Number : ADD342559. Title : NDE of a 3-D surface crack using magnetic field induced by DC current flow,. Corporate Author : ...
DTIC Science & Technology
... Accession Number : ADA068712. Title : Magnetic Field Induced Cross Relaxation between Two Different Spin Transitions of Triplet Coumarin. ...
The purpose of this work is to reveal the governing mechanisms responsible for the magnetic field-induced i) martensite reorientation in Ni2MnGa single crystals, ii) stress-assisted phase transformation in Ni2MnGa single crystals and iii) phase transformation in NiMnCoIn alloys. The ultimate goal of utilizing these mechanisms is to increase the actuation ...
In presence of active orbital degrees of freedom, elementary excitations around a broken-symmetry state may include multipolar waves, but none of these exotic dispersive excitation branches has ever been identified. We show that quadrupolar waves constitute a major component of the dynamics of uranium dioxide in its magnetoquadrupolar ordered phase, and ...
We present a new method called parastriction for investigating the quadrupolar interactions in cubic rare-earth intermetallic compounds. Parastriction measures the rare-earth quadrupolar moment induced by an applied magnetic field through the anisotropic deformation of the lattice. The magnetoelastic coefficients associated with the two principal strain ...
Energy Citations Database
Magnetic field effect on the structure of the ground state of a two-dimensional quantum Heisenberg magnet is analyzed. A plaquette representation is used to solve the self-consistent problem and calculate the collective excitation spectrum in a magnetic field. Conditions are found for quantum transition between non-magnetic and oblique antiferromagnetic phases. The change in the ground state of ...
We report on the growth and characterization of epitaxial thin films of orthorhombic YMnO3. It is found that a ferroelectric polarization exists along c-axis (Pc~90 nC/cm2) and a magnetic field induces the development of a ferroelectric polarization along a-axis (Pa) while suppressing Pc. This field-induced switching is consistent with ...
The ferroelectric order and magnetic field induced effects observed in the spiral phase of MnWO4 are described theoretically. It is demonstrated explicitly that the Dzyaloshinskii-Moriya antisymmetric interactions contribute to the correlation between spins and electric dipoles in the incommensurate and ...
Using high resolution x-ray diffraction in magnetic fields up to 12.5 T, we have directly observed a magnetic field driven commensurate-incommensurate transition in a spin-Peierls compound, the organic charge transfer salt tetrathiafulvalene-Cu-[ital bis]-dithiolene (TTF-CuBDT). The field induced transition is weakly first order. The period of the incommensurate lattice ...
We report new magnetization measurements on the spin-gap compound NiCl{sub 2}-4SC(NH{sub 2}){sub 2} at the low-field boundary of the magnetic field induced ordering. The critical density of the magnetization is analyzed in terms of a Bose-Einstein condensation (BEC) of bosonic quasiparticles. The analysis of the ...
DOE Information Bridge
X-ray and neutron scattering studies were performed on DyB4 which exhibits both a quadrupolar ordering and a macroscopic lattice distortion. A forbidden reflection at 7.792 keV near the Dy L3 absorption edge is identified as a quadrupolar ordering peak, and the quadrupolar ...
La{sub 2}CuO{sub 4} undergoes a magnetic field induced transition in a field of {approx}5.7 Tesla at low temperatures. The origin of this transition is the Dzyaloshinskii-Moriya interaction which is present in effective spin Hamiltonians for systems of sufficiently low symmetry, and, which leads to weak ferromagnetism in the CuO planes ...
Large magnetic-field-induced strains have been observed in Heusler alloys with a body-centred cubic ordered structure and have been explained by the rearrangement of martensite structural variants due to an external magnetic field. These materials have attracted considerable attention as potential magnetic actuator materials. Here we report the ...
An analytic response theory formulation for the leading-order magnetic field-induced and field-dependent quadrupole splitting in nuclear magnetic resonance spectra is presented and demonstrated with first-principles calculations for {sup 21}Ne, {sup 36}Ar, and {sup 83}Kr in noble gas atoms. The case of molecules was studied for {sup ...
The formation of ordered complex structures is one of the most challenging fields in the research of biomimic materials because those structures are promising with respect to improving the physical and mechanical properties of man-made materials. In this letter, we have developed a novel approach to fabricating complex structures on the mesoscale by combining ...
Multipolar ordering in metallic holmium 4f shell was studied by non resonant X-ray scattering at the helical antiferromagnetic phase. The quadrupolar nature of the 2? satellite peaks is confirmed from the good agreement of the measured values of the form factor with calculated values for quadrupolar scattering. The strong spin-orbit ...
The effect of strain on charge order melting in half doped manganite Pr0.5Ca0.5MnO3 thin films of different thicknesses has been investigated. The films were deposited on (100) oriented MgO substrates by pulsed laser deposition technique and were characterized by x-ray diffraction, electrical resistivity and magnetoresistance measurements. A field induced charge ...
Nuclear magnetic resonance (NMR) spectroscopy of quadrupolar nuclei is complicated by the coupling of the electric quadrupole moment of the nucleus to local variations in the electric field. The quadrupolar interaction is a useful source of information about local molecular structure in solids, but it tends to broaden resonance lines causing crowding and ...
Nuclear magnetic resonance (NMR) spectroscopy of quadrupolar nuclei is complicated by the coupling of the electric quadrupole moment of the nucleus to local variations in the electric field. The quadrupolar interaction is a useful source of information about local molecular structure in solids, but it tends to broaden resonance lines, causing crowding and ...
Solid-state nuclear magnetic resonance (NMR) of quadrupolar nuclei has recently undergone remarkable development of capabilities for obtaining structural and dynamic information at the molecular level. This review summarizes the key achievements attained during the last couple of decades in solid-state NMR of both integer spin and half-integer spin ...
We report on measurements of magnetic-field induced nematic order in the bent-core liquid crystal 4-chlororesorcinol bis[4-(4-n-dodecyloxybenzoyloxy) benzoate]. Using the 31 T solenoid at the National High Magnetic Field Laboratory, we have observed, at temperatures less than 1 degrees above the clearing point, a first-order transition to the nematic ...
We report on measurements of magnetic-field induced nematic order in the bent-core liquid crystal 4-chlororesorcinol bis[4-(4-n-dodecyloxybenzoyloxy) benzoate]. Using the 31 T solenoid at the National High Magnetic Field Laboratory, we have observed, at temperatures less than 1� above the clearing point, a first-order transition to the nematic phase. The ...
We present a D2 NMR investigation of the gapped spin-1/2 compound Cu2(C5H10N2D2)2Cl4. Our measurements reveal the presence of a magnetic field-induced transverse staggered magnetization (TSM) which persists well below and above the field-induced 3D long-range magnetically ordered (FIMO) phase. The symmetry of this TSM is different from ...
... Accession Number : ADD133959. Title : Magnetic Field-Induced Martensitic Transformations in Fe-Ni-C Invar and Non-Invar Alloys,. ...
... ANTIMONY ALLOYS, ELECTRICAL CONDUCTIVITY), (*BISMUTH ALLOYS, ELECTRICAL CONDUCTIVITY), METALLOIDS, SINGLE CRYSTALS ...
Electric and magnetic fields induced inside rotating superconductors are explained in terms of the familiar centrifugal and Coriolis forces. (AIP)
... Title : Electromagnetic Arming Rate Regulator. ... The magnetic field induces within the pallet, magnetic losses which retards the arming rate. ...
... Title : Device to Measure Unwanted Electric and Magnetic Field Induced Voltages in Remote Measurement Sensors. Descriptive ...
The central line intensity of a spin I = 7/2, excited by a radio frequency (rf) pulse, is calculated by taking into account the first-order quadrupolar interaction during excitation. Thus, the result is valid for any ratio of quadrupolar coupling to pulse amplitude. The quadrupolar coupling of the nuclei vanadium ...
Particular strain geometry in graphene could lead to a uniform pseudomagnetic field of order 10T and might open up interesting applications in graphene nanoelectronics. Through quantum transport calculations of realistic strained graphene flakes of sizes of 100 nm, we examine possible means of exploiting this effect for practical electronics and valleytronics devices. First, ...
Behaviours of the parameters ST and SH as well as irreversible ``susceptibilities'' kirr and dirr, which characterize the magnetic aftereffect of strain, are studied for the (Fe0.965Ni0.035)0.49Rh0.51 alloy in the region of temperature and magnetic field induced first order magnetostructural phase transitions. The ...
The TFTR Ohmic Heating (OH) System will apply 140,000 volt impulses upon the OH coils to start the plasma. In order to reduce the voltage stress to ground on the OH coils to 12 kV without changing the magnetic field induced by the OH system in the plasma, six d-c current interrupters will be applied to six entry ...
Magnetic relaxation in spatially homogeneous /sup 3/He-B is investigated within the framework of the Leggett-Takagi theory. The following results were obtained with the external magnetic field turned off: the averaged equation of motion of the magnetization, the spatial configuration of the magnetization and of the order parameter under conditions corresponding to the presence ...
We have measured the resistivity parallel and perpendicular to the CuO2 planes in La1.905Ba0.095CuO4 (Tc= 32 K) as a function of perpendicular magnetic field. We have discovered a significant regime of field and temperature where the perpendicular resistivity is finite (and large) but the parallel resistivity is zero. This regime appears to correspond to a quasi-two-dimensional vortex glass phase, ...
We have performed magnetization measurements of Gd5Ge4 with little or no ferromagnetic (FM) impurities under a pulsed magnetic field up to 40 T. The results reveal previously undetected transitions between 85 and 105 K, that is, a distinct second-order antiferromagnetic (AFM)-paramagnetic (PM) transition, followed by a first-order PM-ferromagnetic (FM) ...
Field-induced strains of 6% are reported in ferromagnetic Ni-Mn-Ga martensites at room temperature. The strains are the result of twin boundary motion driven largely by the Zeeman energy difference across the twin boundary. The strain measured parallel to the applied magnetic field is negative in the sample/field geometry used here. The strain saturates in fields of order 400 ...
The first order quadrupolar perturbation of the /sup 14/N NMR spectrum yields information regarding the static and dynamic properties of the surrounding electronic environment. Signal to noise problems caused by long /sup 14/N longitudinal relaxation times (T/sub 1/) and small equilibrium polarizations are reduced by rotating frame cross polarization (CP) ...
We investigated the magnetic field dependence of quadrupolar splitting and phase relaxation time of nuclear spins in an n-GaAs/AlGaAs (110) quantum well (QW) by optically detected nuclear magnetic resonance (NMR). The NMR spectra show large quadrupolar splitting induced by an internal field gradient in the QW epilayer. At lower magnetic fields, the ...
Many strongly correlated materials display quadrupolar (Jahn-Teller) distortion of the local octahedral structural units. It is common for these distortions to be observed by probes of local structure but absent in the crystallographic average structure. The ordering of these quadrupoles is important in determining the properties of manganites and ...
We hereby report a methodology that permits a quantitative investigation of the temporal self-organization of submicron sized superparamagnetic composite particles in the presence of an external magnetic field. The kinetics of field-induced self-organization into linear chains, time-dependent chain-size distribution, resolved growth steps (condensation, polarization, colinearity, and ...
MHD turbulence has long been proposed as a mechanism for the heating of coronal loops in the framework of the Parker scenario for coronal heating. So far most of the studies have focused on its dynamical properties without considering its thermodynamical and radiative features, because of the very demanding computational requirements. In this paper we extend this previous research to the ...
We have constructed hybrid magnetometers by coupling a flux transformer of YBa{sub 2}Cu{sub 3}O{sub 7-x} to a Nb-PbIn SQUID. The low frequency (1/f) noise is dominated by fluctuations in the supercurrent circulating in the transformer, driven by vortex motion. The application of a small static magnetic field induces a supercurrent that ...
The magnetoelectric effect of chromium sesquioxide Cr2O3 has been determined experimentally as a function of temperature. One measures the electric field-induced magnetization on Cr2O3 crystals or the magnetic field-induced polarization. From the magnetoelectric moduli of Cr2O3 we extract a four-dimensional relativistic invariant pseudoscalar ?� . ...
Earlier, the linear magnetoelectric effect of chromium sesquioxide Cr2O3 has been determined experimentally as a function of temperature. One measures the electric field-induced magnetization on Cr2O3 crystals or the magnetic field-induced polarization. From the magnetoelectric moduli of Cr2O3 we extract a 4-dimensional relativistic invariant pseudoscalar ...
Resistivity measurements performed under pressure in the paramagnetic ground state of CeRu2Si2 are reported. They demonstrate that the relative change of effective mass through the pseudo metamagnetic transition is invariant under pressure. The results are compared with the first order metamagnetic transition due to the antiferromagnetism of Ce0.9La0.1Ru2Si2 which corresponds ...
Using the exact propagators in a constant magnetic field, the neutrino self-energy has been calculated to all orders in the field strength B within the minimal extension of the Weinberg-Salam model with massive Dirac neutrinos. A simple and very accurate formula for the self-energy is obtained, that is valid for 0?B?mW2/e and for neutrino transverse momentum to the magnetic ...
Magnetic shape memory alloys (MSMAs) have recently drawn considerable research interest due to their ability to produce magnetic field-induced strains (MFIS) , at least one order of magnitude higher than those of ordinary magnetostrictive materials. In the present work microstructure dependence of martensitic phase transformation and ...
The metal-insulator transition (MIT) of BaVS3 is suppressed under pressure, and above the critical pressure of pcr?2GPa the metallic phase is stabilized. We present the results of detailed magnetoresistivity measurements carried out at pressures near the critical value in magnetic fields up to B=12T . We found that slightly below the critical pressure the structural tetramerization�which ...
We demonstrate the suitability of polarization microscopy to study the recently discovered (parallel) nematic�(perpendicular) nematic phase separation. This novel type of phase transition is induced by applying an external magnetic field to a nematic liquid crystal of boardlike colloidal goethite and is due to an interplay between the intrinsic magnetic properties of goethite and the collective ...
We demonstrate the suitability of polarization microscopy to study the recently discovered (parallel) nematic-(perpendicular) nematic phase separation. This novel type of phase transition is induced by applying an external magnetic field to a nematic liquid crystal of boardlike colloidal goethite and is due to an interplay between the intrinsic magnetic properties of goethite and the collective ...
Versatile and gigantic magnetoelectric (ME) phenomena have been found for a single crystal of DyFeO3. Below the antiferromagnetic ordering temperature of Dy moments, a linear-ME tensor component as large as alphazz approximately 2.4 x 10(-2) esu is observed. It is also revealed that application of magnetic field along the c axis induces a multiferroic (weakly ferromagnetic and ...
A complex study of magnetic properties including dc magnetization, H1 NMR, and magnetic torque measurements has been performed for the organic conductor ?-(BETS)2Mn[N(CN)2]3 which undergoes a metal-insulator transition at TMI?25K. NMR and the magnetization data indicate a transition in the manganese subsystem from paramagnetic to a frozen state at TMI, which is, however, not a simple N�el type ...
The temperature and field dependences of the magnetization of a single crystal of a new class of layered cobaltites, TbBaCo4O7+x , with a structure containing a Kagom� lattice and a triangular lattice were measured. The measurements were performed on a SQUID magnetometer at temperatures in the range 2 300 K and in magnetic fields of up to 55 kOe for two field orientations. The anisotropy of the ...
We investigate the Sakai-Sugimoto model at nonzero baryon chemical potential in a background magnetic field both in the confined phase and in the deconfined phase with restored chiral symmetry. In this case the 8-brane Chern-Simons term becomes important. In the confined phase it generates a gradient of the pseudoscalar 'pion', which carries a nonvanishing baryon charge. Above a ...
We present detailed, low temperature, magnetoresistance and specific heat data from measurements on YbNiSi3 in magnetic field applied along the easy magnetic axis, H | b. Initially the antiferromagnetic ground state changes into a field-induced metamagnetic phase at �16 kOe (T ->0). On further increase of magnetic field, magnetic order is suppressed to below 0.4 K at ...
We have used in-field neutron and x-ray single-crystal diffraction to measure the incommensurability {delta} of the crystal and magnetic structures of multiferroic TbMnO{sub 3}. We show that the flop in the electric polarization at the critical field HC, for field H along the a and b axes, coincides with a first-order transition to a commensurate phase with propagation vector ...
This study experimentally investigates the elastic properties of individual iron-gallium nanowires with and without an applied magnetic bias field. The experiments were conducted with a custom manipulator stage designed for use within a scanning electron microscope, where nanowires were mechanically tested both statically and dynamically. Experiments were also performed in the presence of a 20 Oe ...
Well-ordered Co90Pt10 nanotubes and nanowires have been fabricated into anodic aluminum oxide (AAO) templates by using a dc electrodeposition method. The effects of an external magnetic field on the magnetic properties of Co90Pt10 nanotubes and nanowires are investigated. The results show that the external magnetic field during electrodeposition has a significant effect on ...
First principles calculations of the electronic structure of MnCoSi and a spiral state model are used to analyze magnetic-field induced magnetic order-order phase transitions in MnCoSi at pressures up to 2 kbar. This shows that the magnetic moments of Mn and Co in MnCoSi are created by collective d-electrons and that pressure ...
A biomembrane-mimetic complex fluid that spontaneously orients in the presence of a magnetic field to yield a highly ordered lamellar structure is described. Macroscopically oriented lamellae were produced by exploiting the inverted thermoreversible phase transition of the material, that is, by aligning the sample below the phase transition temperature (<16 C)(i.e., in the ...
Several oxygen-17-enriched silicates were studied using dynamic-angle spinning (DAS) NMR spectroscopy at two magnetic field strengths. The DAS method averages second-order quadrupolar interactions by reorienting a sample about a time-dependent axis, thereby yielding high-resolution spectra for half-odd integer spin quadrupolar nuclei ...
Magnetic-field induced magnetic order-order phase transitions in Fe0.69Mn1.31As are studied using first principles calculations of the electronic structure of Fe2-xMnxAs system alloys and a two-band model of itinerant magnets. It is shown that, within this model, the low-temperature ground and magnetic-field induced states can be ...
Experimental investigations of reversible and irreversible magnetic field induced first-order phase transitions under pressure in the sample (Sm0.5Gd0.5)0.55Sr0.45MnO3 of the system (Sm1-xGdx)0.55Sr0.45MnO3 have made it possible to construct a P-T magnetic phase diagram in which a wide (of the ...
The magnetic properties of the rare-earth intermetallic compound DyAg2 are studied in detail with the help of magnetization and heat capacity measurements. It is shown that the multiple magnetic phase transitions can be induced in DyAg2 both by temperature and magnetic field. The detailed magnetic phase diagram of DyAg2 is determined experimentally. It was already known that DyAg2 undergoes an ...
The magnetic properties of the rare-earth intermetallic compound DyAg(2) are studied in detail with the help of magnetization and heat capacity measurements. It is shown that the multiple magnetic phase transitions can be induced in DyAg(2) both by temperature and magnetic field. The detailed magnetic phase diagram of DyAg(2) is determined experimentally. It was already known that DyAg(2) ...
Nuclear quadrupolar relaxation rates have been measured in the solid and liquid states of AuGa2, Au0.95Pd0.05Ga2, and AuIn2 in order to investigate the effect of melting on quadrupolar relaxation processes. The quadrupolar relaxation rates are found to increase by factors of 3 and 5, respectively, when AuGa2 and ...
We present a detailed study of the properties of Pr1 - xCaxMnO3 which shows that for a range of compositions (0.3 <= x < 0.5) there is a first-order magnetic field induced insulator-metal transition. In zero field the resistivity ? of this material shows an activated behaviour and ? exceeds 108 ? cm below 50 ...
It is theoretically shown that, in the fourfold symmetric d-wave superconducting phase, a paramagnetic pair-breaking (PPB) enhanced sufficiently by increasing the applied magnetic field induces not only the Fulde�Ferrell�Larkin�Ovchinnikov (FFLO) superconducting state but also an incommensurate antiferromagnetic (AFM) ...
In a companion paper, we discussed second-order quadrupolar effects in solids and the theory of the NMR response of a two-dimensional (2D) fluid. This paper illustrates the theoretical treatment through a consideration of the NMR response of 23Na and 27Al in ?-alumina. It is shown that dynamical information is contained in the temperature dependence of the ...
The first order quadrupolar perturbation of the exp 14 N NMR spectrum yields information regarding the static and dynamic properties of the surrounding electronic environment. Signal to noise problems caused by long exp 14 N longitudinal relaxation times ...
National Technical Information Service (NTIS)
Using the effective field theory with a probability distribution technique that accounts for the self-spin correlation functions, the layer longitudinal magnetizations and quadrupolar moments of a spin-1 Ising film and their averages are examined. These q...
By employing a quadrupolar boson Hamiltonian of the sixth order, the coherent state formalism applied to the study of the fundamental band is shown to display, within the d implies 0 range, the model of fully lined up states having been proposed by Das, D...
A selective 180/sup 0/ pulse in the z direction is shown to refocus the second-order broadening of the (1/2)-(1/2) central transition in the spin-(5/2) nucleus /sup 27/Al. Evidence for this refocusing is the formation of an echo after transverse magnetization is created by a selective 90/sup 0/ x pulse, and the p/sub z/ pulse following the initial decay leads to a rise and ...
Excitations and neutron scattering spectra in the antiferro-quadrupolar ordering phase of CeB6 are studied theoretically. We develop a general formulation of the boson expansion method of multipoles and clarify the selection rules governing the multipolar dynamics. We apply the method to the RKKY model, which was introduced before for this material, and ...
Ferromagnetic shape memory alloys (FSMA) have the possibility to induced a strain by applying a magnetic field. The main advantage of the FSMA is that the strain cycling frequency is two orders of magnitude higher than coventional shape memory alloys. The best alloy showing this effect is the Ni-Mn-Ga system, with a high mobility of its martensite variants and high ...
The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH)3] platelets is studied by means of optical birefringence and small-angle x-ray scattering (SAXS) techniques. The suspensions display field-induced ordering at moderate field strengths (a few Tesla), which increases with increasing particle concentration. The ...
The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH){sub 3}] platelets is studied by means of optical birefringence and small-angle x-ray scattering (SAXS) techniques. The suspensions display field-induced ordering at moderate field strengths (a few Tesla), which increases with increasing particle ...
The magnetic-field-induced orientational order in the isotropic phase of colloidal gibbsite [Al(OH)3] platelets is studied by means of optical birefringence and small-angle x-ray scattering (SAXS) techniques. The suspensions display field-induced ordering at moderate field strengths (a few Tesla), which increases with increasing particle concentration. ...
Bi3Mn4O12(NO3), consisting of the honeycomb lattices of Mn^4+ (d^3) ions, has dominant antiferromagnetic interactions (?CW=-257 K) but its spins do not order down to 0.4 K. However, applied magnetic fields induce a long-range magnetic order, which is believed to arise from the spin canting due ...
We propose a general approach to the description of the long-ranged elastic interaction in the nematic colloids, based on the symmetry breaking of the director field. The type of the far-field interaction between particles immersed in a nematic host is determined by the way the symmetry is broken in the near-field region around the colloidal particle. This is caused both by the particle's shape ...
the time-dependent magnetic field induced in the plasma to provide a self- consistent field description. The applied magnetic field and model geometry match ...
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time-dependent magnetic field induced in the plasma to provide a self-consistent field description. The applied magnetic field and model geometry match ...
... Alloy concentrations are near 10 at.% Sb and ... SEMICONDUCTORS, *BAND THEORY OF SOLIDS, *ANTIMONY ALLOYS, *BISMUTH ALLOYS ...
... composition that resulted in reversible FIPT under magnetic field magnitudes much ... for MSMAs using finite element method and taking into account ...
Nov 25, 2001 ... How can steady magnetic fields induce electric currents? .... The change, whenever it occurs, will be gradual and the field will not drop to zero ...
... Page 9. induction effects in determining magnetic fields induced by surface ... potential function for the induced electromagnetic field, we demon- ...
In this work the authors report a study of the photoinduced insulator-to-metal transition in manganese oxide perovskites of the formula Pr{sub 1{minus}x}Ca{sub x}MnO{sub 3}. The transition is closely related to the magnetic field induced insulator-to-metal transition (CMR effect) observed in these materials. It is accompanied by a ...
We report the results of the magnetic and dielectric relaxation measurement on yttrium iron garnet Y3Fe5O12 which shows the 2nd order magneto-electric (ME) effect under an applied electric field [1] and the 1st order ME effect by an electric field cooling procedure [2]. We found that the temperature dependence of the dielectric relaxation dynamics ...
We investigate theoretically the properties of s -wave multiband superconductors in the weak-coupling (BCS) limit in the presence of pair-breaking effects of magnetic field. It is shown that a gapless superconducting state must appear in quasi-two-dimensional superconductors in magnetic fields parallel to the plane, corresponding to a Sarma state induced on one of the Fermi surfaces. The ...
It has been found experimentally that in the strongly anisotropic orthorhombic antiferromagnetic crystal LiCoPO4 (TN=21.7 K) the destruction of antiferromagnetic order by a magnetic field directed along the antiferromagnetism axis H?b occurs in steps by means of three phase transitions: two first-order transitions in the fields H1=118 kOe, H2=224 Oe and ...
The magnetic structure of the quasi-1D compound Ca3CoMnO6 (CCMO) has been determined by carrying out Rietveld analysis of low temperature neutron diffraction (ND) patterns. The magnetic measurements on CCMO have established that the compound exhibits a long range antiferromagnetic ordering (TN) around 15 K, and interesting magnetic properties below TN. In ...
We present a 2D NMR investigation of the gapped spin-1/2 compound Cu2(C5H10N2D2)2Cl4. Our measurements reveal the presence of a magnetic field-induced transverse staggered magnetization (TSM) which persists well below and above the field-induced 3D long-range magnetically ordered (FIMO) phase. The symmetry of this TSM is different from ...
The materials exhibiting magnetic-field-induced first-order magnetic transitions are usually characterized by irreversibility in magnetoresistance (MR). The envelope curve in such cases has been known to lie below the virgin curve in MR versus magnetic-field plots as a consequence of relatively lower electrical resistivity of ferromagnetically aligned ...
Motivated by experiments on the S=1 triangular lattice antiferromagnet NiGa2S4 and theoretical predictions that it has a quadrupolar/spin-nematic ground state, we discuss how quadrupolar correlations may actually be more relevant at finite temperature, giving rise to an unusual two peak structure in the specific heat. Moreover, dominant third-neighbor ...
The multiple-quantum magic-angle spinning (MQMAS) and satellite-transition magic-angle spinning (STMAS) experiments refocus second-order quadrupolar broadening of half-integer quadrupolar spins in the form of two-dimensional experiments. Isotropic shearing is usually applied along the indirect dimension of the 2D spectra such that an ...
The magnetization of TmTe along the [100] direction was measured under multiple extreme conditions of high magnetic field (/B<=17T) and high pressure (/P<=1.2GPa) and low temperature (/T>=0.5K). Anomalies due to the antiferro-quadrupolar transition were observed in the field and temperature dependencies of the magnetization and the /B-T phase diagram was determined at ...
Spatially restricted biological current distributions, like the primary neuronal response in the human somatosensory cortex evoked by electric nerve stimulation, can be described adequately by a current multipole expansion. Here analytic formulas are derived for computing magnetic fields induced by current multipoles in terms of an ...
PubMed Central
Data from ab -oriented YBa{sub 2}Cu {sub 3}O{sub 7}/I/Cu tunnel junctions are presented. Self-assembled monolayers form the insulating tunnel barrier, I. The YBa{sub 2}Cu {sub 3}O{sub 7} features in the tunneling conductance match those of low-leakage ab -oriented YBa{sub 2}Cu {sub 3}O{sub 7}/Pb junctions. Results show that the zero-bias conductance peak is an Andreev bound state (ABS) of a d ...
The compound ?-(BETS)2FeCl4 provides an effective demonstration of the interaction of ? conduction electron and d -electron localized moment systems in molecular crystalline materials where antiferromagnetic insulating and magnetic field induced superconducting states can be realized. The metal-insulator transition has been ...
We present results of dc magnetization measurements investigating the magnetic field-induced metamagnetic transition in Ce(Fe0.96Ru0.04)2. In the temperature region where this material undergoes a ferromagnetic to antiferromagnetic first-order phase transition, the isothermal virgin magnetization curve lies distinctly outside the ...
In order to understand the magnetic field-induced restoration of a highly conductive state in ? ? (BETS)2FeCl4, static (SQUID) and dynamic (ESR and AFR) magnetization measurements were performed on polycrystalline samples and single crystals, respectively. In addition, cantilever and resistivity measurements under steady fields were ...
) inter- action or e#27;ective g-factors of magnetic ions. Experimentally measured thermodynamic propertiesVol. 34 (2003) ACTA PHYSICA POLONICA B No 2 MAGNETIC FIELD-INDUCED GAP IN QUANTUM SPIN CHAINS: EPR- lying spin excitations in the absence of an external magnetic #28;eld H . A weak external magnetic #28;eld
on the magnetization rotation angles i. The thermodynamic restrictions placed on the martensitic variant rearrangementModeling of the Magnetic Field-Induced Martensitic Variant Reorientation and the Associated Magnetic Shape Memory Effect in MSMAs Bj�orn Kiefera and Dimitris C. Lagoudasa a Department of Aerospace
... Magnetic field-induced type-I type-IT transition in (ZnMn)Se/(ZnBe)Se spin superlattices ... Page 3. 350 Quantum Wells and Superlattices ...
At crystallographic sites of low symmetry it is possible for the interactions governing the NMR powder line shape of half-integer spin quadrupolar nuclei to have different orientation dependences. In such cases, it is found that the NMR line shape is sensitive to the relative orientation of the quadrupolar (Q) and chemical shielding (CS) tensors. An ...
The only stable NMR-active isotope of strontium, (87)Sr, is a spin-9/2 quadrupolar nucleus that has a low gyromagnetic ratio, a low natural abundance, and a large nuclear electric quadrupole moment. In this work, we utilize the quadrupolar Carr-Purcell-Meiboom-Gill (QCPMG) pulse sequence and a 21.14 T NMR spectrometer at the Pacific Northwest National ...
The employment of periodic arrays of plasmonic nanoparticles has been proposed by several groups for enhanced transmission or absorption and for realizing optical nanowaveguides. Generally, due to their small transverse dimensions, such linear arrays have been operated near their dipolar resonance. However, it has been recently shown that nanoscale plasmonic particles may also support ...
Dipolar and quadrupolar resonance wavelengths of SiO2/Au nanoshell surface plasmons are designed at 560 nm to enhance the light trapping in thin film solar cells. In order to quantitatively describe the light trapping effect, the forward-scattering efficiency (FSE) and the light trapping efficiency (LTE) are proposed by considering the light scattering ...
We report on an analysis of a well known three-pulse sequence for generating and detecting spin I=1 quadrupolar order when various pulse errors are taken into account. In the situation of a single quadrupolar frequency, such as the case found in a single crystal, we studied the potential leakage of single and/or double quantum ...
We report on an analysis of a well known three-pulse sequence for generating and detecting spin I = 1 quadrupolar order when various pulse errors are taken into account. In the situation of a single quadrupolar frequency, such as the case found in a single crystal, we studied the potential leakage of single and/or double quantum ...
Spin-locking of spin I=3/2 and I=5/2 nuclei in the presence of small resonance offset and second-order quadrupolar interactions has been investigated using both exact and approximate theoretical and experimental nuclear magnetic resonance (NMR) approaches. In the presence of second-order quadrupolar interactions, ...
We report on a theoretical investigation of the spin-1/2-dimer compound Ba3Cr2O8 in view of the Bose-Einstein condensation (BEC) of triplet excitations under an applied magnetic field. We apply the self-consistent Hartree-Fock-Popov (HFP) approach to a microscopic Hamiltonian, using the realistic triplon dispersion measured in an inelastic neutron scattering experiment. We investigate the ...
It has long been speculated that tsunamis produce measurable perturbations in the magnetic field. Recent deployments of highly accurate magnetometers and the exceptionally deep solar minimum provided ideal conditions to identify these small signals for the tsunami resulting from the strong Chilean earthquake on February 27, 2010. We find that the magnetic observatory measurements on Easter Island, ...
The magnetoelectric effect of chromium sesquioxide Cr{sub 2}O{sub 3} has been determined experimentally as a function of temperature. One measures the electric field-induced magnetization on Cr{sub 2}O{sub 3} crystals or the magnetic field-induced polarization. From the magnetoelectric moduli of Cr{sub 2}O{sub 3} we extract a four-dimensional relativistic ...
La5/8-yPryCa3/8MnO3 (LPCMO) manganites exhibit a complex phase diagram due to coexisting and competing magnetic and electronic phases. A complete understanding of the origin of phase coexistence and separation in this system has remained elusive. To resolve this, it is essential to employ experimental methods that allow detailed investigations of the temperature and magnetic field response of the ...
This article reports on the magnetoelectric (ME) effect observed in bi- and trilayered polymers consisting of polyvinylidene fluoride (PVDF) and polyurethane (PU) filled with magnetically hard magnetite Fe3O4 or Terfenol-D(TeD) magnetostrictive material. The samples had the following compositions: (PU+2 wt% Fe3O4/PVDF), (PU+2 wt% Fe3O4/PVDF/PU+2 wt% Fe3O4), (PU+50 wt% TeD/PVDF) and (PU+50 wt% ...
Using fundamental measure density functional theory we investigate paranematic�nematic and nematic�nematic phase coexistence in binary mixtures of circular platelets with vanishing thicknesses. An external magnetic field induces uniaxial alignment and acts on the platelets with a strength that is taken to scale with the platelet ...
The interplay of multi-dimensional complex magnetic order parameters leads to interesting effects like magnetically induced ferroelectricity. A particular interesting example is TbMn2O5 because of the associated magnetic-field controllable electric polarization. By optical second harmonic generation we show that the gigantic magnetoelectric effect originates in three ...
Magnetotransport studies were carried out for the ruthenocuprates GdSr2Ru1 - xCu2 + xO8 (x = 0 and 0.05) in the temperature range 2-300 K and in fields up to 9 T. The electrical resistivity measurements near the superconducting region indicate that these compounds exhibit granular superconductivity. The magnetic field has significant effects on the intragranular superconducting transition ...
The La0.67Sr0.33MnO3 composition prepared by sol�gel synthesis was studied by dc magnetization measurements. A large magnetocaloric effect was inferred over a wide range of temperature around the second-order paramagnetic�ferromagnetic transition. The change of magnetic entropy increases monotonically with increasing magnetic field and reaches the value of 5.15 J/kg K at ...
We will discuss strong magneto-electric coupling in the metal-organic compound NiCl2-4SC(NH2)2 (also known as a metal-organic framework or molecular magnet). Magneto-electric multiferroic behavior is traditionally investigated in transition-metal oxides, however we are expanding the field to metal-organics, which are designable materials with soft lattices and electrically polar organic elements. ...
The spinel GeCo2O4 has the pyrochlore lattice of Co2+ ions, in which the kagom� and triangular planes stack alternately along the [111] direction. It shows antiferromagnetic ordering below TN� 21 K with a characteristic wave vector of QM=(1/2,1/2,1/2). The spin arrangement is ferromagnetic in the kagom� and triangular planes and antiferromagnetic between the kagom� ...
Magnetic and dielectric properties with varying magnitude and direction of magnetic-field H have been investigated for a triangular-lattice helimagnet MnI2. The in-plane electric polarization P emerges in the proper screw magnetic ground state below 3.5 K, showing the rearrangement of six possible multiferroic domains as controlled by the in-plane H. With every 60� rotation of H around the [001] ...
Electric currents induced due to 60 Hz magnetic fields in a human body placed in a close proximity of various high voltage transmission lines are computed. A realistic model of the human body from the anatomical and electrical point of view with resolution of 1.3 cm for the body and 0.665 cm for the head is used. The computations are performed using the impedance method. Three representative ...
A mysterious antiferroquadrupolar ordered phase of CeB6 is considered as originating from the Txyz-type magnetic octupole moment in magnetic fields. By resonant x-ray diffraction, we have verified that the Txyz-type octupole is indeed induced in the 4f orbital of Ce with a propagation vector (1/2,1/2,1/2), thereby supporting the theory. We observed an asymmetric field ...
We investigate magnetic-field-induced changes on transmitted light intensity in a magnetic disordered phase of iron oxide nanoparticle suspension. We observe a dramatic decrease in the transmitted light intensity at a critical magnetic field. The critical magnetic field follows power-law dependence with the volume fraction of the nanoparticles suggesting a ...
A boundary layer analysis is presented to investigate numerically the effects of radiation, thermophoresis and the dimensionless heat generation or absorption on hydromagnetic flow with heat and mass transfer over a flat surface in a porous medium. The boundary layer equations are transformed to non-linear ordinary differential equations using scaling group of transformations and they are solved ...
In this paper we present an innovative application of magnetorheological (MR) fluids to haptic interfaces. These materials consist of a suspension of a micron-sized, magnetizable particles in a synthetic oil. Exposure to an external magnetic field induces in the fluid a change in rheological behaviour turning it into a near-solid in ...
The temporal modulation of fluorescence induced by a static external field after selective optical excitation of the first excited electronic state (/sup 2/B/sub 2/) of nitrogen dioxide has been studied. The rotationally-resolved radiative lifetime as well as the hyperfine-resolved fluorescence polarization anisotropy and excited state Lande g-factor are extracted from ...
We explore magnetic-field-induced ordering and microphase separation of aqueous ferrofluid and of aqueous mixtures of ferrofluid with nonmagnetic latex spheres. The ferrofluid is a surfactant stabilized aqueous suspension of magnetite (Fe3O4) particles with average diameter 20 nm (including the approximately 2.5-nm thick surfactant layer); the nonmagnetic ...
Measurements of the inverse Faraday effect and of the absorption of circularly polarized laser light in plasmas are reported. The experiments were performed with a Nd:YAG with irradiances in the range {approx}10{sup 14} W/cm{sup 2}. The absorption of circularly polarized light was higher by 14% relative to the absorption of linear polarized light. This increase in the laser absorption may be ...
Cosmological magnetic fields induce temperature and polarization fluctuations in the cosmic microwave background (CMB) radiation. A cosmological magnetic field with current amplitude of order 10{sup -9} G is detectable via observations of CMB anisotropies. This magnetic field (with or without helicity) generates ...
Single-phase Bi(0.80)La(0.20)FeO(3) (BLFO) and Bi(0.80)La(0.20)Fe(1-x)Nb(x)O(3) (BLFNO) samples were prepared in order to study the dielectric, magnetic and magnetoelectric properties of La and Nb codoped BiFeO(3). Rietveld refinement of x-ray diffraction patterns of La and Nb codoped samples has been performed using the R3c space group. Magnetic hysteresis loops revealed that ...
In a recent work, Zhang and coworkers [Phys. Rev. BPLRBAQ1098-012110.1103/PhysRevB.82.075111 82, 075111 (2010)] studied the Zeeman splitting of the Kondo resonance for the single impurity Anderson model in a finite magnetic field B with the numerical renormalization group (NRG) method. They report a discrepancy between the position of the Kondo resonance in the total spectral function and the ...
. A nonlinear 1D dynamo model with a heuristic ff-ansatz for magnetic field-induced turbulence is considered growing for weak fields and suppressed by strong fields. The amplification of initial magnetic fields is regarded in accretion disks like both Kepler disks and galaxies. The solutions for the magnetic field are symmetric with respect to the equator, ...
The martensite to austenite phase transition in the off-stoichiometric Heusler alloy Ni(50)Mn(34)In(16) can be induced both by temperature change and by application of a magnetic field. We have used scanning Hall probe imaging to study the magnetic field induced martensite-austenite phase transition. The study provides clear visual ...
Magnetic Shape Memory Alloys (MSMAs) combine shape-change/deformationrecovery abilities of heat driven conventional shape memory alloys (SMA) and magnetic field driven magnetostrictives through martensitic transformation. They are promising for actuator applications, and can be employed as sensors/power-harvesters due to their capability to convert mechanical stimuli into magnetic response or vice ...
Shapes of phospholipid vesicles that involve narrow neck(s) were studied theoretically. It is taken into account that phospholipid molecules are intrinsically anisotropic with respect to the membrane normal and that they exhibit quadrupolar orientational ordering according to the difference between the local principal membrane curvatures. Direct ...
Our single crystal study reveals that PrTr2Al20 (\\textit{Tr}= Ti and V) provides the first examples of a cubic ?3 nonmagnetic ground doublet system that shows the Kondo effect including a -{\\ln T} dependent resistivity. The ?3 quadrupolar moments in PrV2Al20 induce anomalous metallic behavior through hybridization with conduction electrons such as T1/2 dependent resistivity ...
Resonant soft x-ray Bragg diffraction at the Dy M(4,5) edges has been used to study Dy multipoles in the combined magnetic and orbitally ordered phase of DyB(2)C(2). The analysis incorporates both the intra-atomic magnetic and quadrupolar interactions between the 3d core and 4f valence shells. Additionally, we introduce to the formalism the interference of ...
Resonant soft x-ray Bragg diffraction at the Dy M4, 5 edges has been used to study Dy multipoles in the combined magnetic and orbitally ordered phase of DyB2C2. The analysis incorporates both the intra-atomic magnetic and quadrupolar interactions between the 3d core and 4f valence shells. Additionally, we introduce to the formalism the interference of ...
We have investigated the magnetic properties of polycrystalline Y bRu2(Ge1 ? xSix)2 samples using magnetic susceptibility, electrical resistivity, and specific heat measurements. All the results indicate that the Yb ions in Y bRu2(Ge1 ? xSix)2 are in a stable trivalent state. The antiferromagnetic ordering shifts to lower temperature with increasing Si concentration (x). The ...
We present the macroscopic equations for polar nematic liquid crystals. We consider the case where one has both, the usual nematic director, n[over ] , characterizing quadrupolar order as well as the macroscopic polarization, P , representing polar order, but where their directions coincide and are rigidly coupled. In this case one has ...
We present the macroscopic equations for polar nematic liquid crystals. We consider the case where one has both, the usual nematic director, n? , characterizing quadrupolar order as well as the macroscopic polarization, P , representing polar order, but where their directions coincide and are rigidly coupled. In this case one has to ...
An antiferroquadrupolar ordering at T(Q)=0.11??K has been found in a Pr-based superconductor PrIr(2)Zn(20). The measurements of specific heat and magnetization revealed the non-Kramers ?(3) doublet ground state with the quadrupolar degrees of freedom. The specific heat exhibits a sharp peak at T(Q)=0.11??K. The increment of T(Q) in magnetic fields and the ...
An antiferroquadrupolar ordering at TQ=0.11K has been found in a Pr-based superconductor PrIr2Zn20. The measurements of specific heat and magnetization revealed the non-Kramers ?3 doublet ground state with the quadrupolar degrees of freedom. The specific heat exhibits a sharp peak at TQ=0.11K. The increment of TQ in magnetic fields and the anisotropic B-T ...
Physical implementation of quantum-information processing by liquid-state nuclear magnetic resonance, using weakly coupled spin-(1/2) nuclei of a molecule, is well established. Nuclei with spin>1/2 oriented in liquid-crystalline matrices is another possibility. Such systems have multiple qubits per nuclei and large quadrupolar couplings resulting in well separated lines ...
The carbon-13 multiplet spin-lattice relaxation in ^{13}CH_2 and ^{13}CH _3^in systems is studied in detail by various nonselective and selective pulse techniques. Simultaneous fitting of the resulting relaxation curves with various rates and initial conditions allows for the extraction of both auto- and cross-correlated dipolar spectral densities which can provide detailed information on the ...
The (2)H quadrupolar interaction is a sensitive tool for the characterization of deuterium-metal binding states. In the present study, experimental solid-state (2)H MAS NMR techniques are used in the investigations of two ruthenium clusters, D(4)Ru(4)(CO)(12) (1) and D(2)Ru(6)(CO)(18) (2), which serve as model compounds for typical two-fold, three-fold, and octahedral ...
Electronic charges introduced in copper-oxide (CuO(2)) planes generate high-transition-temperature (T(c)) superconductivity but, under special circumstances, they can also order into filaments called stripes. Whether an underlying tendency towards charge order is present in all copper oxides and whether this has any relationship with superconductivity are, ...
Magnetic shape memory alloys (MSMAs) have recently been developed into a new class of functional materials that are capable of magnetic-field-induced actuation, mechanical sensing, magnetic refrigeration, and energy harvesting. In the present work, the magnetic field-induced martensitic phase transformation (FIPT) in Ni{sub 45}Mn{sub 36.5}Co{sub 5}In{sub ...
We report {sup 115}In nuclear quadrupolar resonance measurements of the heavy fermion compound CeRhIn{sub 5} in the paramagnetic and antiferromagnetic states. The magnetic order is consistent with a model of helical modulation of the Ce moments that is incommensurate with the lattice, and the magnetic dynamics indicate possible two-dimensional behavior. ...
The orientational order of monomerically thin films of polydimethylsiloxane melt deposited on the surfaces of cylindrical pores is investigated in this paper by solid-state deuterium nuclear magnetic resonance. Spectra demonstrate substantial orientation of the methyl groups by the surface. The quadrupolar splitting of the oriented film component saturates ...
Spin-state equilibria in the whole set of LCoO3 (where L stands for a rare-earth metal or Y) have been investigated with the use of 59Co NMR as a probe for the polycrystalline samples (except Ce) in the temperature interval 110-550 K and frequency range 3- 11.6 MHz. Besides confirming the coexistence of the high-spin-low-spin state in this temperature range, a quadrupolar ...
A massive magnetic-field-induced structural transformation in Gd5Ge4, which occurs below 30 K, was imaged at the atomic level by uniquely coupling high-resolution x-ray powder diffraction with magnetic fields up to 35 kOe. In addition to uncovering the nature of the magnetic field induced structural transition, our ...
Deuterium and phosphorus nuclear magnetic resonance techniques were used to study the interaction of the mitochondrial precursor protein apocytochrome c with headgroup-deuterated (dioleoylphosphatidyl-L-(2-{sup 2}H{sub 1})serine) and acyl chain deuterated (1,2-(11,11-{sup 2}H{sub 2})dioleoylphosphatidylserine) dispersions. Binding of the protein to dioleoylphosphatidylserine liposomes results in ...
Spin thermodynamic techniques have been applied to the inhomogeneous chlorine quadrupolar resonance in the antifluorite crystal K_2OsCl _6. The operator techniques developed by Pratt to calculate the effects of radiofrequency pulses on a quadrupolar spin system have been extended to deal with a variety of multiple pulse techniques. In particular, the ...
The antiferroquadrupolar ordering of is explored by probing thermal and thermoelectric transport. The lattice thermal conductivity drastically increases with the ordering, as a consequence of a large drop in carrier concentration and a strong electron-phonon coupling. The low level of carrier density in the ordered state is confirmed ...
Magnetoelectric (ME) properties in yttrium iron garnet (YIG:Y3Fe5O12) , including both the first-order and second-order effects, have long been under dispute. In particular, the conflict between observations of the first-order ME effect and the centrosymmetric lattice structure has remained as a puzzling issue. As a key to solve the ...
A new class of hydromagnetic dynamos is presented for which the fluid motions are large-scale Rossby waves in a zonal flow, driven by latitudinally non-uniform heating. The magnetic fields induced by these motions are allowed to react upon them, through e...
Observations of magnetic field induced collapse of Meissner sized diamagnetism with a coincident decrease in electrical conductivity in pressure quenched CdS material at 77 K are reported. These results are consistant with the existence of superconducting...
On single crystals of cubic (lead and aluminum) and axial (indium, tin, zinc, and gallium) metals, the length changes were measured at the magnetic field induced transition from the superconducting to the normal state between 0.3 K and the appropriate cri...
The inductors made of carbon Nanotube (CNT) have been proposed. Though the fabrication of the proposed inductor is still challenging and has many problems, merits of the proposed inductor are following, (i)The magnetic field induced by the current in CNT ...
Nickel-manganese-gallium foams connected internally by sizeable single-crystalline elements provide magnetic-field-induced strains comparable to free-standing bulk single crystals, and demonstrate feasibility for the application of magnetic shape memory.
Austenitic stainless steels have been used as structural alloys in high field superconducting magnets. Some of the candidate structural alloys for the next generation of magnetic confinement fusion reactors are of this type. In this application the alloys...
We report discovery of a partial energy gap, or minigap, in strongly coupled double quantum wells (QWs), due to an anticrossing of the two QW dispersion curves. The anticrossing and minigap are induced by an in-plane magnetic field B(sub (parallel)), and ...
Magnetic field induced changes in the fluorescence intensity are observed from two reaction centerless mutants of Rhodopseudomonas capsulata. These results constitute the first direct assignment of such effects arising solely from the antenna pigments in photosynthetic bacteria.
... The helicity Pcic of the incident light varied from -1 (left handed circular, cr) to + 1 (right handed circular, or) according to Pcirc = sin 2p were p is the ...
Poloidal magnetic fields induced by radial flows under spherically symmetric conditions are known to decay pointwise to zero on a diffusion time-scale. Decay to zero on the diffusion time-scale, in an integral sense, of toroidal fields in the same conditions is demonstrated.
Model spectra for the electric and magnetic fields induced by oceanic internal waves are obtained by combining Green function solutions to the two electromagnetic modal equations with the Garrett-Munk kinematic description of the internal wave field. The ...
psychological, and environmental effects to which humans are subjected during and following simu- ..... electric and magnetic fields induce currents in humans and other ... in events at the donor side of photosystem 2. We have identified ...... Using an array of 14 superconducting magnetic field sensors ...
The polarization, precession frequency and mu /sup +/-meson spin relaxation rate in transverse magnetic fields up to 1900 Ce are determined in magnetized iron, nickel and cobalt samples. The magnetic fields inducing mu / sup +/-meson precession in ferromagnetic substances are considered. (auth)
Calculations of the electronic and vibrational second hyperpolarizabilities of various quadrupolar ?-conjugated molecules performed at the ab initio Hartree-Fock level of approximation show that the vibrational contribution is large for most nonlinear optical phenomena. As for unsubstituted ?-conjugated compounds, the Raman term which contributes to the dc-Kerr and degenerate ...
The 31P N.M.R. bandshapes and spin-lattice relaxation times for solid PCl5 have been studied under conditions of magic-angle rotation, for both the phase II and phase III forms. Temperature and magnetic field were both varied. The influence of molecular motion on both bandshapes and T1 is discussed. Second-order effects resulting from the dipolar coupling of 31P to the ...
We study an electric quadrupole contribution to sum frequency generation (SFG) at air?liquid interfaces in an electronically and vibrationally nonresonant condition. Heterodyne-detected electronic sum frequency generation spectroscopy of air?liquid interfaces reveals that nonresonant ?((2)) (second-order nonlinear susceptibility) has a negative sign and nearly the same value ...
We study an electric quadrupole contribution to sum frequency generation (SFG) at air/liquid interfaces in an electronically and vibrationally nonresonant condition. Heterodyne-detected electronic sum frequency generation spectroscopy of air/liquid interfaces reveals that nonresonant ?(2) (second-order nonlinear susceptibility) has a negative sign and nearly the same value for ...
The collagen is the most common protein in mammalians. Thus its interaction with small molecules and particularly amino acids is of interest. Owing to the high degree of order of collagen fibers in a tendon, the 1H-1H and 1H-13C dipolar interactions and the 2H quadrupolar interaction of small molecules interacting with it do not average to zero. In the ...
A systematic analysis of resonant x-ray Bragg diffraction data for UPd(3), with signal enhancement at the U M(IV) edge, including possible structural phase transitions leads to a new determination of the space groups of the material in the phases between T(0)=7.8 K and T(+1)=6.9 K, as P 222(1), and between T(-1)=6.7 K and T(2)=4.4 K, as P2(1). In addition, the quadrupolar ...
CeCoIn5 is a heavy fermion superconductor which appears to be straddling the boundary between the superconducting and magnetic ground states. At the superconducting critical field H c2 this material displays NFL behavior in transport and thermodynamic properties, pointing at a Quantum Critical Point (QCP) at H c2, and hinting at the presence of magnetic fluctuations, probably due to an AFM ...
We calculate the magnetic-field-dependent nonlinear conductance and noise in a two-dimensional macroscopic inhomogeneous system. If the system does not possess a specific symmetry, the magnetic field induces a nonzero third cumulant of the current even at equilibrium. This cumulant is related to the first and second voltage derivatives ...
We propose a method to excite and detect the mechanical modes of dielectric microspheres. The mechanical modes are excited by simultaneously imposing static and harmonic magnetic fields on the spheres. They are monitored by simultaneously exciting and tracking the whispering gallery optical modes of the spheres. An analysis is carried out to investigate the relationship between the applied ...
The generation of pure quadrupolar stimulated-echo spectra is successfully demonstrated for the spin-3/2 probe 9Be in a single crystal of triglycine fluoberyllate. This solid exhibits a paraelectric-to-ferroelectric phase transition. From experiments carried out for various mixing times no indications for a slow soft mode could be detected in this crystal. Then ion conducting ...
We measured the electrical resistivity, specific heat, magnetostriction, magnetization and de Haas-van Alphen (dHvA) oscillation in UPd3 with the hexagonal structure in order to clarify the quadrupolar and magnetic properties as well as the nature of conduction electrons. The high-field magnetization measurement at 4.2 K in magnetic fields up to about 50 T ...
Nuclear magnetic resonance has been employed to identify the phases of the system NbNx in several samples of niobium nitride. The epsilon phase has been identified by a characteristic second-order quadrupolar broadened central transition with two sets of ...
Results of EPR and sup 31 P and sup 51 V NMR experiments on vanadium-phosphorous-oxygen catalysts revealed the presence of V(III) as well as the expected V(IV) and V(V). Preparations known to be highly oxidized,l such as beta -VOPO sub 4 and B phase catal...
-order isotropic quadrupole shift effects. B10H14. We consider nido-decaborane, B10H14, as a final case MAS spectra of decaborane (B10H14) at B0 ) 11.7 T recorded in an n-hexane solution (a
of these is present in PAIC chain and, as long as an isolated macromolecule is considered, one may expect a very weak macromolecules have AX very small. For PAIC dissolved in toluene at concen- trations typical for the formation of the ordered struc- ture of the macromolecules on the quadrupolar splittings of toluene-d8 solvent Although
The origin of the monoclinic lattice distortion observed in the low-temperature antiferromagnetic phase of UO/sub 2/ is studied. Taking into account the coupling between the internal and external strains, characteristic of the fluorite structure, and using the experimental phonon data, it is shown that the Jahn-Teller mechanism alone strongly favors a uniform distortion with ferroquadrupolar ...
We have investigated the spin/orbital phase diagram in the perovskite orthovanadate RVO3 ( R=Eu , Y, Dy, and Ho) by measurements of magnetization, dielectric constant, specific heat, Raman scattering spectra, and x-ray diffraction, focusing on the interplay between the V3d spin and the 4f moment of the R ion. The thermally induced phase transition between the C-type spin/G-type orbital ...
The CsCl-type antiferromagnetic compound NdMg presents below TN=61K a second spontaneous transition at 35 K, associated with an antiferroquadrupolar (AFQ) ordering of the ?Pxy? quadrupolar component. The AFQ ordering induces a new charge periodicity that is detected by the onset of satellite reflections in the x-ray Bragg diffraction ...
Solid-state (53)Cr NMR spectra of a series of chromate (CrO4(2-)) and dichromate (Cr2O7(2-)) salts have been examined by employing the stepped-frequency quadrupolar Carr-Purcell Meiboom-Gill (QCPMG) experiment and high applied magnetic field strengths, 11.75 and 18.8 T. Cr-53 nuclear quadrupolar coupling constants, CQ(53Cr), ranging from 1.23 to 5.01 MHz ...
