Dependence of magnetic anisotropy on MgO thickness and buffer layer in Co20Fe60B20-MgO structure

作者：Yamanouchi M^*; Koizumi R; Ikeda S; Sato H; Mizunuma K; Miura K; Gan H D; Matsukura F; Ohno H

来源：Journal of Applied Physics, 2011, 109(7): 07C712.

DOI：10.1063/1.3554204

We investigated the dependence of perpendicular magnetic anisotropy in CoFeB-MgO on the MgO layer thickness. Magnetization curves show that a clear perpendicular magnetic easy axis is obtainable in a 1.5-nm thick CoFeB layer by depositing MgO of more than three monolayers. We investigated anisotropy in CoFeB-MgO deposited on four different buffer layers. Results show that a counter interface of CoFeB-nonmagnetic metal affects the perpendicular anisotropy of CoFeB/MgO.

• 出版日期2011-4-1