Cycloidal vortex motion in easy-plane ferromagnets due to interaction with spin waves

被引：12
|
作者：
Kovalev, AS
Mertens, FG
Schnitzer, HJ
机构：
[1] Ukrainian Acad Sci, Inst Low Temp Phys & Engn, UA-61103 Kharkov, Ukraine
[2] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany
来源：
EUROPEAN PHYSICAL JOURNAL B | 2003年 / 33卷 / 02期
关键词：
D O I：
10.1140/epjb/e2003-00150-3
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The dynamics of a non-planar vortex in a two-dimensional easy-plane ferromagnet of finite size is studied. Spin dynamics simulations show small cycloidal oscillations of the vortex around its mean path. In contrast to an earlier phenomenological theory we give a physical explanation: The oscillations occur due to the interaction of the vortex with coherent spin waves which are excited by this vortex at the moment when it starts to move, in order to conserve the total energy and angular momentum. The calculation of these quantities yields the frequencies and amplitudes of the cycloidal oscillations in good agreement with the simulation data.
引用
收藏
页码：133 / 145
页数：13
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