The magneto-optical Barnett effect in metals (invited)
The magneto-optical Barnett effect in metals (invited)
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金属中的磁光巴尼特效应（特邀）
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
J. Hohlfeld
中科院分区：
文献类型：
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作者：
A. Rebei;J. Hohlfeld
在存在耗散和波动的情况下，偏振光与自旋的相互作用被证明相当于可以引起切换的自旋转移过程。在高能等离子体中，自旋转移由自旋-自旋交换项主导，而在较低能量密度下，自旋转移由光学巴尼特效应和耗散主导。后一种效应与光学玻色子模式结合使用来预测最近在 GdCoFe 薄膜中测量到的飞秒磁化反转。基于 Bloch 和 Landau-Lifshitz 方程的传统方法仅对与环境的弱耦合有效，因此无法重现这种超快切换。
The interaction of polarized light with a spin in the presence of dissipation and fluctuations is shown to be equivalent to a spin transfer process that can cause switching. In high energy plasmas, the spin transfer is dominated by a spin-spin exchange term while at lower energy densities it is dominated by an optical Barnett-like effect and dissipation. This latter effect is used in conjunction with optical boson modes to predict femtosecond magnetization reversal believed to be recently measured in GdCoFe thin films. Conventional approaches based on the Bloch and the Landau–Lifshitz equations are valid only for weak coupling to the environment and hence are unable to reproduce this ultrafast switching.