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Perpendicular magnetic anisotropy of Pt/Co 2 FeAl 0.5 Si 0.5 /MgAl 2 O 4 trilayers
Author(s) -
Wu Yong,
Xu Xiaoguang,
Li Lu,
Wang Zhicheng,
Miao Jun,
Jiang Yong
Publication year - 2016
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201600160
Subject(s) - feal , annealing (glass) , materials science , perpendicular , anisotropy , oxide , atmospheric temperature range , aluminium oxide , condensed matter physics , crystallography , metallurgy , intermetallic , chemistry , physics , optics , geometry , mathematics , alloy , meteorology
Perpendicular magnetic anisotropy (PMA) has been achieved in Co 2 FeAl 0.5 Si 0.5 (CFAS) based trilayers with MgAl 2 O 4 (MAO) as oxide layer. It was found that the PMA is sensitive to the annealing conditions, the thicknesses of MAO ( t MAO ) and CFAS ( t CFAS ) layers. A strong PMA can be observed in the Pt/CFAS/MAO structure after 340 °C annealing and maintained as high as 400 °C. For a fixed CFAS thickness ( t CFAS = 1.5 nm), there is a narrow range of t MAO to keep the PMA in this structure. Oxidation at the CFAS/MAO interface plays a very significant role to the PMA, which can be controlled by tuning t MAO for fixed annealing temperature and t CFAS .