中国物理B ›› 2013, Vol. 22 ›› Issue (5): 57305-057305.doi: 10.1088/1674-1056/22/5/057305

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Strong perpendicular magnetic anisotropy in Co2FeAl0.5Si0.5 film sandwiched by MgO layers

王圣, 李晓其, 白丽娟, 徐晓光, 苗君, 姜勇   

  1. State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2012-05-24 修回日期:2012-11-30 出版日期:2013-04-01 发布日期:2013-04-01
  • 基金资助:
    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.

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)   

  1. State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2012-05-24 Revised:2012-11-30 Online:2013-04-01 Published:2013-04-01
  • Contact: Xu Xiao-Guang E-mail:xgxu@ustb.edu.cn
  • Supported by:
    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.

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摘要： 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.

关键词: half-metallic ferromagnets, MgO layers, perpendicular magnetic anisotropy

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.

Key words: half-metallic ferromagnets, MgO layers, perpendicular magnetic anisotropy

中图分类号:  (Magnetoresistance)

  • 73.43.Qt
72.25.Ba (Spin polarized transport in metals) 68.35.Ct (Interface structure and roughness)