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考虑非常数自旋扭矩时LLS方程的微扰解
  • 期刊名称：物理学报
  • 时间：2010.5.15
  • 页码：599-603
  • 分类：O413.1[理学—理论物理;理学—物理]
  • 作者机构：[1]电子科技大学物理电子学院,成都610054
  • 相关基金：电子科技大学青年基金（批准号：L08010401JX0736）; 国家自然科学基金（批准号：60601005）资助的课题
  • 相关项目：行波再生反馈振荡非线性跳频与多模机理研究
作者： 殷海荣|宫玉彬|杨中海|魏彦玉|
关键词： 自旋扭矩, 磁化强度, LLS方程, 微扰, spin torque, magnetization, LLS equation, disturbing method
中文摘要：

不将自旋扭矩因子近似为一个常数,利用Melnikov微扰方法推导了LLS方程解的表达式,通过VC与MATLAB混和编程进行计算,计算结果显示,与将自旋扭矩因子视为常数的情况相比较,自旋扭矩为磁化强度函数时的磁化强度运动轨道在离开未扰轨道初期仅在未扰轨道附近做微小振动,在翻转时刻附近有较大振荡,并且所预言的磁化强度翻转时刻相对提前.

英文摘要：

The LLS equation is analyzed by Melnikov disturbing method when non-constant spin torque is considered. Computing codes are programmed by combining VC and MATLAB. The results reveal that the magnetization trace vibrates round the non-disturbing trace at first,and then surges when close to the reversal point,and the time of reversal is shorter compared with the trace with constant spin torque.

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