High frequency dynamics and magnetic anisotropy of bcc Co films grown on Si (001) substrate

被引：1
|
作者：
Hu, Bo [1 ]
He, Wei [2 ]
Cheng, Zhao-hua [2 ]
机构：
[1] Shanghai Maritime Univ, Coll Arts & Sci, Dept Phys, Shanghai 201306, Peoples R China
[2] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism & Beijing Natl Lab Conden, Beijing 100190, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2022年 / 275卷
基金：
中国国家自然科学基金;
关键词：
Magnetic anisotropy; Bcc structure; Gilbert damping parameter; Micromagnetic simulation;
D O I：
10.1016/j.mseb.2021.115512
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Dynamic magnetization and magnetic anisotropy of Cu/bcc-Co/CoSi2/Si(001) system were investigated by Magneto-Optical Kerr Effect (MOKE) analysis and vector network analyzer ferromagnetic resonance (VNA-FMR). Typical fourfold magnetocrystalline anisotropy of bcc Co film and superposed uniaxial magnetic anisotropy were observed. The uniaxial magnetic anisotropy originated from shape anisotropy as confirmed by micromagnetic simulation. The large magnetocrystalline anisotropy results in high resonance frequency even in the zero applied field. The Gilbert damping parameter alpha obtained by analysis of the dynamic process is close to the theoretically estimated value of bcc phase Co. The Gilbert damping parameter of the bcc-Co film is larger than those of fcc-Co and hcp-Co films. This work indicates the Co damping parameter can be enhanced by using bcc structure, which will help create high-speed magnetoelectronic devices.
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页数：5
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