...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Mechanical back-action of a spin-wave resonance in a magnetoelastic thin film on a surface acoustic wave
【24h】

Mechanical back-action of a spin-wave resonance in a magnetoelastic thin film on a surface acoustic wave

机译：表面声波上磁弹性薄膜中自旋波共振的机械反作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Surface acoustic waves (SAWs) traveling on the surface of a piezoelectric crystal can, through the magnetoelastic interaction, excite traveling spin-wave resonance in a magnetic film deposited on the substrate. This spin-wave resonance in the magnetic film creates a time-dynamic surface stress of magnetoelastic origin that acts back on the surface of the piezoelectric and modifies the SAW propagation. Unlike previous analyses that treat the excitation as a magnon-phonon polariton, here the magnetoelastic film is treated as a perturbation modifying boundary conditions on the SAW. We use acoustical perturbation theory to find closed-form expressions for the back-action surface stress and strain fields and the resultant SAW velocity shifts and attenuation. We demonstrate that the shear stress fields associated with this spin-wave back-action also generate effective surface currents on the piezoelectric both in phase and out of phase with the driving SAW potential. Characterization of these surface currents and their applications in determination of the magnetoelastic coupling are discussed. The perturbative calculation is carried out explicitly to first order (a regime corresponding to many experimental situations of current interest) and we provide a sketch of the implications of the theory at higher order.
机译：在压电晶体表面传播的表面声波（SAW）可以通过磁弹相互作用在沉积在基板上的磁性膜中激发行进的自旋波共振。磁性膜中的这种自旋波共振会产生磁弹性起源的时动态表面应力，该应力会作用回压电体的表面并改变声表面波的传播。不同于先前将激发视为磁振子极化子的分析，此处的磁弹性膜被视为扰动，改变了声表面波上的边界条件。我们使用声学摄动理论来找到后作用表面应力和应变场以及由此产生的声表面波速度位移和衰减的闭合形式。我们证明，与此自旋波反向作用相关的剪切应力场还在与驱动SAW势同相和异相的压电体上产生有效的表面电流。讨论了这些表面电流的特性及其在确定磁弹性耦合中的应用。扰动计算是显式地进行到一阶的（一种与当前感兴趣的许多实验情况相对应的状态），并且我们提供了该理论在更高阶的含义的草图。

著录项

  • 来源
    《Physical review》 |2016年第1期|014436.1-014436.7|共7页
  • 作者

    P. G. Gowtham; D. Labanowski; S. Salahuddin;

  • 作者单位

    Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, California, USA;

    Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, California, USA;

    Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, California, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号