中国物理B ›› 2016, Vol. 25 ›› Issue (4): 47503-047503.doi: 10.1088/1674-1056/25/4/047503

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

Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

Miao-Ling Zhang(张苗玲), Jun Ye(叶军), Rui Liu(刘锐), Shu Mi(米菽), Yong Xie(谢勇), Hao-Liang Liu(刘郝亮), Chris Van Haesendonck, Zi-Yu Chen(陈子瑜)   

  1. 1 Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing 100191, China;
    2 Solid State Physics and Magnetism Section, KU Leuven, Celestijnenlaan 200 D, BE-3001 Leuven, Belgium
  • 收稿日期:2015-11-10 修回日期:2015-12-22 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: Zi-Yu Chen E-mail:chenzy@buaa.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274033, 11474015, and 61227902), the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20131102130005), and the Beijing Key Discipline Foundation of Condensed Matter Physics.

Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

Miao-Ling Zhang(张苗玲)1, Jun Ye(叶军)1, Rui Liu(刘锐)1, Shu Mi(米菽)1, Yong Xie(谢勇)1, Hao-Liang Liu(刘郝亮)2, Chris Van Haesendonck2, Zi-Yu Chen(陈子瑜)1   

  1. 1 Key Laboratory of Micro-nano Measurement-Manipulation and Physics (Ministry of Education), Beihang University, Beijing 100191, China;
    2 Solid State Physics and Magnetism Section, KU Leuven, Celestijnenlaan 200 D, BE-3001 Leuven, Belgium
  • Received:2015-11-10 Revised:2015-12-22 Online:2016-04-05 Published:2016-04-05
  • Contact: Zi-Yu Chen E-mail:chenzy@buaa.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274033, 11474015, and 61227902), the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20131102130005), and the Beijing Key Discipline Foundation of Condensed Matter Physics.

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摘要： The magnetization reversal process of Fe/MgO (001) thin film is investigated by combining transverse and longitudinal hysteresis loops. Owing to the competition between domain wall pinning energy and weak uniaxial magnetic anisotropy，the typical magnetization reversal process of Fe ultrathin film can take place via either an “l-jump” process near the easy axis, or a “2-jump” process near the hard axis, depending on the applied field orientation. Besides, the hysteresis loop presents strong asymmetry resulting from the variation of the detected light intensity due to the quadratic magneto-optic effect. Furthermore, we modify the detectable light intensity formula and simulate the hysteresis loops of the Kerr signal. The results show that they are in good agreement with the experimental data.

关键词: magnetization reversal process, magneto-optic Kerr effect, magnetic anisotropy

Abstract: The magnetization reversal process of Fe/MgO (001) thin film is investigated by combining transverse and longitudinal hysteresis loops. Owing to the competition between domain wall pinning energy and weak uniaxial magnetic anisotropy，the typical magnetization reversal process of Fe ultrathin film can take place via either an “l-jump” process near the easy axis, or a “2-jump” process near the hard axis, depending on the applied field orientation. Besides, the hysteresis loop presents strong asymmetry resulting from the variation of the detected light intensity due to the quadratic magneto-optic effect. Furthermore, we modify the detectable light intensity formula and simulate the hysteresis loops of the Kerr signal. The results show that they are in good agreement with the experimental data.

Key words: magnetization reversal process, magneto-optic Kerr effect, magnetic anisotropy

中图分类号:  (Magnetization reversal mechanisms)

  • 75.60.Jk
42.65.Hw (Phase conjugation; photorefractive and Kerr effects) 75.30.Gw (Magnetic anisotropy)