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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ignatchenko V. A., Man'kov Y. I., Pozdnyakov A. V.
Заглавие : Spin-wave susceptibility of partially randomized ferromagnetic superlattices
Место публикации : J. Exp. Theor. Phys.: MAIK NAUKA/INTERPERIODICA/SPRINGER, 1999. - Vol. 89, Is. 4. - P717-722. - ISSN 1063-7761, DOI 10.1134/1.559033
Примечания : Cited References: 15
Предметные рубрики: SPECTRUM
LOCALIZATION
Аннотация: This paper is a theoretical investigation of the effect of inhomogeneities in the period of a ferromagnetic superlattice on the high-frequency superlattice susceptibility. The calculations are done for a model in which the uniaxial magnetic anisotropy is taken as the physical parameter that characterizes both the ideal superlattice and a partially randomized superlattice. It is found that as the inhomogeneities become more intense, the two resonance peaks corresponding to the splitting of the spectrum at the edge of the Brillouin zone of the superlattice broaden, move closer to each other, and finally merge into one. The height of this peak increases and the peak width decreases as the intensity of the inhomogeneities increases further. The effect of inhomogeneities on the susceptibility differs dramatically in the two limits of short- and long-wave inhomogeneities: in the latter case (in contrast to the former) the dependence of the separation of the susceptibility peaks on the intensity and correlation properties of the inhomogeneities is nonmonotonic. The possibility of observing these effects in spin-wave resonance experiments involving multilayer magnetic films is also discussed. (C) 1999 American Institute of Physics. [S1063-7761(99)01510-3].
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Man'kov Y. I.
Заглавие : Effect of conduction electrons on the law of approach to saturation of a metallic ferromagnet with surface pinning of the magnetic moment
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1999. - Vol. 41, Is. 4. - P582-588. - ISSN 1063-7834, DOI 10.1134/1.1130829
Примечания : Cited References: 37
Предметные рубрики: ANISOTROPY
Аннотация: The effect of conduction electrons on the magnetization curve of a metallic ferromagnet with surface pinning of the magnetic moment is investigated theoretically. The electronic contribution is due to the rearrangement of the discrete spectrum of charge carriers trapped by the nonuniform magnetic induction of such a ferromagnet, and it is a kind of diamagnetic effect that appreciably decreases the volume-averaged magnetization of the ferromagnet. A power-law dependence H-3/4 on the external magnetic field H is obtained according to the law of magnetization approach to saturation. This dependence is due to the contribution of the conduction electrons. (C) 1999 American Institute of Physics. [S1063-7834(99)01804-3].
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