INTERACTION OF THE MOVING DOMAIN-WALL WITH PHONONS

被引：26

作者：

DEMOKRITOV, SO ^{[1
]}

KIRILYUK, AI ^{[1
]}

KREINES, NM ^{[1
]}

KUDINOV, VI ^{[1
]}

SMIRNOV, VB ^{[1
]}

CHETKIN, MV ^{[1
]}

机构：

[1] MV LOMONOSOV STATE UNIV, MOSCOW, USSR

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1991年 / 102卷 / 03期

关键词：

D O I：

10.1016/0304-8853(91)90148-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The interaction between the moving domain wall (DW) and acoustic phonons in the weak ferromagnet YFeO3 has been investigated by means of Brillouin-Mandel'stam spectroscopy method for the first time. The light scattering by the moving DW with the frequency shift due to the Doppler effect has been observed. The DW velocity and the intensity of the scattered light were determined from the spectra as a function of pulsed magnetic field at different temperatures. It was determined that as the DW velocity approaches that of transverse or longitudinal sound extra phonons, or sound soliton, are generated. The light scattering from the excited phonons was observed directly. The space and time evolution of this sound soliton was investigated at T = 2 K. Nonstationary supersound DW motion has been observed. Nonlinear excitation of longitudinal sound was discovered. The temperature dependence of the DW mobility was also measured. The general picture of the DW motion at upsilon almost-equal-to s was discussed.

引用

页码：339 / 353

页数：15

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