Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition
Tuning non-Gilbert-type damping in FeGa films on MgO(001) via oblique deposition
复制标题
通过倾斜沉积调节 MgO(001) 上 FeGa 薄膜的非吉尔伯特型阻尼
DOI：
10.1088/1367-2630/ab5a06
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发表时间：
2019
影响因子：
3.3
通讯作者：
Cheng Zhao-Hua
中科院分区：
文献类型：
--
作者：
Li Yang;Li Yan;Liu Qian;Yuan Zhe;Zhan Qing-Feng;He Wei;Liu Hao-Liang;Xia Ke;Yu Wei;Zhang Xiang-Qun;Cheng Zhao-Hua
The ability to tailor the damping factor is essential for spintronic and spin-torque applications. Here, we report an approach to manipulate the damping factor of FeGa/MgO (001) films by oblique deposition. Owing to the defects at the surface or interface in thin films, two-magnon scattering (TMS) acts as a non-Gilbert damping mechanism in magnetization relaxation. In this work, the contribution of TMS was characterized by in-plane angular dependent ferromagnetic resonance. It is demonstrated that the intrinsic Gilbert damping is isotropic and invariant, while the extrinsic mechanism related to TMS is anisotropic and can be tuned by oblique deposition. Furthermore, the two and fourfold TMS related to the uniaxial magnetic anisotropy and magnetocrystalline anisotropy were discussed. Our results open an avenue to manipulate magnetization relaxation in spintronic devices.
