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21.
Magnetization reversal by high-frequency current in FeCuNbSiB/Al/FeCuNbSiB three-layer film structures is studied. The frequency
spectrum of the voltage arising in a coil wound on the sample as a function of a permanent magnetic field (nonlinear magnetoimpedance)
is taken. It is shown that the frequency spectra of the voltage are qualitatively different for the longitudinal and transverse
orientations of the field with respect to the direction of the current. Frequency spectrum harmonics are demonstrated to be
highly sensitive to a magnetic field. A simple electrodynamic model to describe experimental data is suggested. 相似文献
22.
23.
I. F. Voloshin A. V. Kalinov L. M. Fisher K. I. Kugel’ A. L. Rakhmanov 《Journal of Experimental and Theoretical Physics》1997,84(6):1177-1185
Measurements of the imaginary part of the ac magnetic susceptibility of single crystals and melt-textured samples of YBa2Cu3Ox (YBCO) at T=77 K in a magnetic field ranging between 1 and 20 kOe are reported. If the dc magnetic field H
dc is rotated in the ab plane of the sample, the magnetic susceptibility and critical current density j
c have peaks corresponding to the magnetic field aligned with twin boundaries. Peaks in the curve of j
c versus magnetic field are observed at angles corresponding to these peaks, where
AH
dc in a wide range of magnetic fields. The results have been interpreted in terms of the theory describing twin boundaries as
a system of quasi-planar pinning sites. The pinning is strong if the elastic displacements of flux lines are of the order
of the vortex lattice constant d
f. These displacements decrease with the magnetic field because of the decrease in d
f, and the contribution of the elastic energy to the Gibbs potential is reduced accordingly, which is the cause of the peak
effect.
Zh. éksp. Teor. Fiz. 111, 2158–2174 (June 1997) 相似文献
24.
A model for torsion-stress effect on nonlinear magnetoimpedance in amorphous wires with negative magnetostriction 总被引:1,自引:0,他引:1
N.A. Buznikov A.S. AntonovA.A. Rakhmanov 《Journal of magnetism and magnetic materials》2011,323(1):189-194
A model to describe the influence of torsional stress on nonlinear magnetoimpedance in amorphous wires with negative magnetostriction is proposed. The nonlinear voltage response is found in the framework of the low-frequency approximation taking into account the spatial distribution of the circular magnetic field and the magnetoelastic anisotropy induced by the torsional stress. It is demonstrated that the application of torsional stress results in an increase of the second harmonic amplitude in voltage due to a reinforcement of helical anisotropy in the wire. The second harmonic amplitude is analyzed as a function of external field, torsional stress and current amplitude. The ranges of torsional stress and current amplitude to achieve maximal field sensitivity of the second harmonic are found. 相似文献
25.
JETP Letters - The spin density wave existing on the background of the inhomogeneous charge distribution is examined as a possible ground state of the magic-angle twisted bilayer graphene. When... 相似文献
26.
JETP Letters - Theoretical studies of the theory of nematic superconductivity in doped insulators of the Bi2Se3 family have been reviewed. It is experimentally shown that their transition to the... 相似文献
27.
A. V. Akopyan E. V. Rakhmanov D. A. Grigor’ev M. V. Ryzhov A. V. Tarakanova A. V. Anisimov 《Russian Journal of General Chemistry》2014,84(7):1302-1307
Several ionic liquids containing a chiral center either in the cation or in the anion have been prepared. They have been applied as catalysts and solvents for stereoselective oxidation of methyl phenyl sulfide to obtain the respective sulfoxide. 相似文献
28.
E. V. Rakhmanov A. A. Bobyleva E. V. Lukovskaya O. A. Fedorova A. V. Anisimov 《Russian Journal of General Chemistry》2010,80(11):2323-2328
Complexing ability of crown ethers opens new ways of designing selective extragents and sensitive receptors to various metal
cations. The structure of the oxathiacrown ether complexes with Ag(I), Pb(II), Hg(II), Cd(II), Ni(II), Pd(II) ions was investigated
using the methods of mass spectrometry and 1H NMR spectroscopy. Formation of 1:1 and 2:1 ligand-metal complexes was established. 相似文献
29.
S. A. Bakiyev A. A. Kist Zh. Rakhmanov E. S. Flitsiyan 《Journal of Radioanalytical and Nuclear Chemistry》1991,147(1):59-68
The neutron sources based on the252Cf isotope and having relatively long half-lives and the highest specific neutron yields compared with other ampouled sources are proved to be the most convenient for use in industrial analytical laboratories situated far from the basic nuclear centers. Research making use of californium sources is currently carried out in a number of nuclear centers of the USSR, including the Institute of Nuclear Physics of the Uzbek Academy of Sciences, where a great amount of work have been done on verification of practical use of Cf sources of various activity in different branches of industry, first of all, in geology and mining industry. 相似文献
30.
The processes going on in silver-doped GeO2 films during air-heating were investigated by XPS, TEM, IR and UV-visible spectroscopy methods. Silver was shown to interact with the GeO2 matrix at 500-600 °C to give silver germanate which was decomposed on further heating to form GeO2 and silver nanoparticles, 10-35 nm in size, absorbing in the plasmon resonance region (λmax = 415 nm). The silver nanoparticles are located deep in the films and encapsulated by oxide particles. 相似文献