Theory of magnetic surface anisotropy and exchange effects in the Brillouin scattering of light by magnetostatic spin waves (invited)
Theory of magnetic surface anisotropy and exchange effects in the Brillouin scattering of light by magnetostatic spin waves (invited)
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磁表面各向异性理论和静磁自旋波布里渊散射光的交换效应（特邀）
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
R. Hicken
中科院分区：
文献类型：
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作者：
G. Rado;R. Hicken
本文提出了静磁自旋波对光的非弹性散射中布里渊频移的新理论。与以前的工作相反，本计算包括交换效应，并直接处理磁表面各向异性常数Ks和KSS，而不是通过有效体积各向异性的策略。用本理论和以前的工作解释了W上{110} Fe的实验数据。详细的分析揭示了以前未注意到的事实，即W上（110）Fe的Ks和Kss的符号与GaAs上（110）Fe的相反。一些新的自旋波模式所产生的交换的预测，并显示发生在已被实验研究的频率范围之外。一个定量的解释提出了偶尔适用的理论的基础上有效体积各向异性和零交换。
A new theory of the Brillouin shift in the inelastic scattering of light by magnetostatic spin waves is presented. Contrary to previous work, the present calculations do include exchange effects and treat the magnetic surface anisotropy constants Ks and Kss directly rather than via the stratagem of effective volume anisotropies. The experimental data for {110} Fe on W are explained about as well by the present theory as by previous work. A detailed analysis reveals the previously unnoticed fact that the signs of Ks and Kss for (110) Fe on W are opposite to those for (110) Fe on GaAs. Some new spin‐wave modes arising from exchange are predicted and shown to occur outside the frequency range which has been investigated experimentally. A quantitative explanation is proposed for the occasional applicability of a theory based on effective volume anisotropies and zero exchange.