Temperature dependence of perpendicular magnetic anisotropy in CoFeB thin films
Temperature dependence of perpendicular magnetic anisotropy in CoFeB thin films
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DOI：
10.1063/1.4945682
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发表时间：
2016-04
影响因子：
4
通讯作者：
Yu Fu;I. Barsukov;Jing Li;A. M. Gonçalves;C. Kuo;M. Farle;I. Krivorotov
中科院分区：
文献类型：
--
作者：
Yu Fu;I. Barsukov;Jing Li;A. M. Gonçalves;C. Kuo;M. Farle;I. Krivorotov
We study perpendicular magnetic anisotropy in thin films of Ta/Co20Fe60B20/MgO by ferromagnetic resonance and find a linear temperature dependence for the first and second order uniaxial terms from 5 to 300 K. Our data suggest the possible hybridization of Fe-O orbitals at the CoFeB/MgO interface for the origin of the first order anisotropy. However, we also find that non-interfacial contributions to the anisotropy are present. An easy-cone anisotropy is found for the entire temperature range in the narrow region of film thicknesses around the spin reorientation transition 1.2–1.35 nm.
