铁磁共振
凝聚态物理
激光线宽
材料科学
马格农
磁阻尼
铁磁性
自旋电子学
磁各向异性
各向异性
旋转泵
散射
共振(粒子物理)
自旋极化
磁场
磁化
光学
物理
自旋霍尔效应
原子物理学
激光器
量子力学
振动
电子
作者
Yang Cheng,Jun Hui Lee,Jack Brangham,Shane P. White,William Ruane,P. C. Hammel,Fengyuan Yang
摘要
Metallic ferromagnets with ultra-low damping are highly desirable for charge-based spintronic applications. Here, we systematically investigate the magnetic dynamics of Co25Fe75 epitaxial films with a Gilbert damping constant as low as 7.1 × 10−4. The in-plane angular dependence of ferromagnetic resonance (FMR) was measured on various thicknesses of Co25Fe75 films grown on MgO and MgAl2O4, from which the mechanisms for FMR linewidth broadening can be distinguished and quantified. The thickness dependencies of the magnetic anisotropy and inhomogeneous broadening of the linewidth are good indicators of crystal quality and magnetic uniformity. Additionally, it is shown that anisotropic two-magnon scattering is induced by defects at the surfaces.
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