Spin-orbit-coupling effects on g-value and damping factor of the ferromagnetic resonance in Co and Fe films
Spin-orbit-coupling effects on g-value and damping factor of the ferromagnetic resonance in Co and Fe films
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DOI：
10.1088/0953-8984/15/5/302
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发表时间：
2003-02-12
影响因子：
2.7
通讯作者：
Frait, Z
中科院分区：
文献类型：
--
作者：
Pelzl, J;Meckenstock, R;Frait, Z
光谱分裂因子g和吉尔伯特阻尼常数G是铁磁共振（FMR）测量的磁性参数，除了磁晶各向异性能外，它们还可以提供磁有序材料中自旋轨道耦合的信息。虽然自旋轨道耦合的影响已经被彻底研究，并在绝缘过渡金属化合物中得到很好的理解，但在3d金属磁性化合物中的微观机制仍需要进一步澄清。特别是在薄膜和多层膜中，层间的界面效应和相互作用可以改变自旋和轨道矩，从而导致g值和吉尔伯特阻尼常数的变化。本文给出了在Cr（001）衬底上生长的Co外延膜和在MgO（001）衬底上生长的Co_（1-x）Fe_x（100）合金膜以及在InAs（001）衬底上生长的Fe（100）薄膜的频率相关铁磁共振测量结果。实验数据产生明确的证据的重要性的表面或界面的膜的轨道和自旋力矩的大小。
The spectroscopic splitting factor g and the Gilbert damping constant G are magnetic parameters accessible to ferromagnetic resonance (FMR) measurements, which apart from the magneto-crystalline anisotropy energy can provide information on the spin-orbit coupling in magnetically ordered material. Whereas the effect of spin-orbit coupling has been thoroughly investigated and is well understood in insulating transition metal compounds, in 3d-metallic magnetic compounds the microscopic mechanism still needs further clarification. Particularly in thin films and multilayers interface effects and interaction between layers can modify both spin and orbital moments leading to changes of the g-value and the Gilbert damping constant. Experimental results are presented from frequency dependent FMR measurements on Co epitaxial films grown on Cr(001) and on films of the alloy Co1-xFex (100) deposited on MgO(001), and from recent studies on Fe(100) films grown on InAs(001). The experimental data yield clear evidence of the importance of surfaces or interfaces of the films on the magnitude of orbital and spin moment.