【摘 要】
：
Tuning magnetic damping constant in dedicated spintronic devices has important scientific and technological implica-tions. Here we report on anisotropic damping
【机 构】
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National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Na
论文部分内容阅读
Tuning magnetic damping constant in dedicated spintronic devices has important scientific and technological implica-tions. Here we report on anisotropic damping in various compositional amorphous CoFeB films grown on GaAs(001) sub-strates. Measured by a vector network analyzer-ferromagnetic resonance (VNA-FMR) equipment, a giant magnetic damp-ing anisotropy of 385％, i.e., the damping constant increases by about four times, is observed in a 10-nm-thick Co40Fe40B20film when its magnetization rotates from easy axis to hard axis, accompanied by a large and pure in-plane uniaxial mag-netic anisotropy (UMA) with its anisotropic field of about 450 Oe. The distinct damping anisotropy is mainly resulted from anisotropic two-magnon-scattering induced by the interface between the ferromagnetic layer and the substrate, which also generates a significant UMA in the film plane.
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