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Strong perpendicular magnetic anisotropy in Co2FeAl0.5Si0.5 film sandwiched by MgO layers |
Wang Sheng (王圣), Li Xiao-Qi (李晓其), Bai Li-Juan (白丽娟), Xu Xiao-Guang (徐晓光), Miao Jun (苗君), Jiang Yong (姜勇) |
State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract Co2FeAl0.5Si0.5 (CFAS) based multilayers sandwiched by MgO layers have been deposited and annealed at different temperatures. Perpendicular magnetic anisotropy (PMA) with the magnetic anisotropy energy density Ku ≈ 2.5×106 erg/cm3 and the coercivity Hc=363 Oe has been achieved in the Si/SiO2/MgO (1.5 nm)/CFAS (2.5 nm)/MgO (0.8 nm)/Pt (5 nm) film annealed at 300 ℃. The strong PMA is mainly due to the top MgO layer. The structure can be used as top magnetic electrodes in half-metallic perpendicular magnetic tunnel junctions.
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Received: 24 May 2012
Revised: 30 November 2012
Accepted manuscript online:
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PACS:
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73.43.Qt
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(Magnetoresistance)
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72.25.Ba
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(Spin polarized transport in metals)
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68.35.Ct
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(Interface structure and roughness)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 50831002, 51271020, 50971025, 51071022, and 11174031), the National Basic Research Program of China (Grant No. 2012CB932702), PCSIRT, Beijing Nova Program, China (Grant No. 2011031), the Beijing Municipal Natural Science Foundation, China (Grant No. 2102032), and the Fundamental Research Funds for the Central Universities, China. |
Corresponding Authors:
Xu Xiao-Guang
E-mail: xgxu@ustb.edu.cn
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Cite this article:
Wang Sheng (王圣), Li Xiao-Qi (李晓其), Bai Li-Juan (白丽娟), Xu Xiao-Guang (徐晓光), Miao Jun (苗君), Jiang Yong (姜勇) Strong perpendicular magnetic anisotropy in Co2FeAl0.5Si0.5 film sandwiched by MgO layers 2013 Chin. Phys. B 22 057305
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