Open AccessThe research of the perpendicular magnetic anisotropy in CoFeB/AlOx/Ta and AlOx/CoFeB/Ta structures
Author(s) -
陈希,
刘厚方,
韩秀峰,
姬扬
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.137501
Subject(s) - materials science , perpendicular , condensed matter physics , magnetization , anisotropy , magnetic anisotropy , fabrication , magnetic field , optics , medicine , physics , geometry , mathematics , alternative medicine , pathology , quantum mechanics
The perpendicular magnetic anisotropy (PMA) of the CoFeB/AlOx/Ta structure and the AlOx/CoFeB/Ta structure with different thicknesses of both CoFeB and AlOx is studied. Magnetization curves show that the CoFeB/AlOx/Ta structure has a clear perpendicular magnetic easy axis while the AlOx/CoFeB/Ta structure does not. The cause of the asymmetrical phenomenon in the symmetric structures is analyzed. Dependence of the perpendicular coercivities on the thicknesses of CoFeB and AlOx shows that both of them can affect the strength of the PMA originating from the interfacial interaction. This work will be meaningful for the fabrication of the AlOx-based perpendicular magnetic tunnel junctions.