Tuning of the Microwave Magnetization Dynamics in Dy-Doped Fe65Co35-Based Thin Films
Tuning of the Microwave Magnetization Dynamics in Dy-Doped Fe65Co35-Based Thin Films
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DOI：
10.1109/tmag.2015.2436053
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发表时间：
2015-11-01
影响因子：
2.1
通讯作者：
Yin, Yuan
中科院分区：
文献类型：
--
作者：
Xu, Feng;Xu, Zhan;Yin, Yuan
为了增强Fe65Co35薄膜的微波磁化动力学阻尼，我们研究了dy掺杂对Fe65Co35薄膜的影响。随着掺杂量的增加，饱和磁化强度大大降低。由于晶粒细化，掺杂后矫顽力大幅度降低。由于dy掺杂增强了轨道-自旋耦合，阻尼因子如预期的那样增加。除了高dy浓度外，溅射气体压力的调谐也有效地增强了阻尼，避免了共振频率的显著下降。
To enhance the damping of microwave magnetization dynamics, we investigate the effect of Dy-doping into Fe65Co35 thin films. The increase of Dy-doping reduces the saturation magnetization substantially. The coercivities decrease largely after Dy-doping, ascribed to the grain refinement. The damping factor increases as expected due to the enhanced orbital-spin coupling by Dy-doping. Other than the high Dy-concentration, the tuning by sputtering gas pressure is also effective in enhancing the damping, avoiding the remarkable decrease of resonance frequency.