中国物理B ›› 2012, Vol. 21 ›› Issue (7): 77503-077503.doi: 10.1088/1674-1056/21/7/077503

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Magnetic anisotropy and magnetization reversal of ultrathin iron films with in-plane magnetization on Si(111) substrates

刘郝亮, 何为, 杜海峰, 房亚鹏, 吴琼, 张向群, 杨海涛, 成昭华   

  1. State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2012-03-19 修回日期:2012-04-09 出版日期:2012-06-01 发布日期:2012-06-01
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929201, 2010CB934202, and 2011CB921801) and the National Natural Science Foundation of China (Grant Nos. 50931006, 11034004, and 51021061).

Magnetic anisotropy and magnetization reversal of ultrathin iron films with in-plane magnetization on Si(111) substrates

Liu Hao-Liang(刘郝亮), He Wei(何为), Du Hai-Feng(杜海峰), Fang Ya-Peng(房亚鹏), Wu Qiong(吴琼), Zhang Xiang-Qun(张向群), Yang Hai-Tao(杨海涛), and Cheng Zhao-Hua(成昭华)   

  1. State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2012-03-19 Revised:2012-04-09 Online:2012-06-01 Published:2012-06-01
  • Contact: Cheng Zhao-Hua E-mail:zhcheng@iphy.ac.cn
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant Nos. 2009CB929201, 2010CB934202, and 2011CB921801) and the National Natural Science Foundation of China (Grant Nos. 50931006, 11034004, and 51021061).

摘要: The magnetic anisotropy and magnetization reversal of single crystal Fe films with thickness of 45 monolayer (ML) grown on Si(111) have been investigated by ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM). Owing to the significant modification of the energy surface in remanent state by slight misorientation from (111) plane and a uniaxial magnetic anisotropy, the azimuthal angular dependence of in-plane resonance field shows a six-fold symmetry with a weak uniaxial contribution, while the remanence of hysteresis loops displays a two-fold one. The competition between the first and second magnetocrystalline anisotropies may result in the switching of in-plane easy axis of the system. Combining the FMR and VSM measurements, the magnetization reversal mechanism has also been determined.

关键词: magnetic anisotropy, magnetization reversal, ultrathin film

Abstract: The magnetic anisotropy and magnetization reversal of single crystal Fe films with thickness of 45 monolayer (ML) grown on Si(111) have been investigated by ferromagnetic resonance (FMR) and vibrating sample magnetometer (VSM). Owing to the significant modification of the energy surface in remanent state by slight misorientation from (111) plane and a uniaxial magnetic anisotropy, the azimuthal angular dependence of in-plane resonance field shows a six-fold symmetry with a weak uniaxial contribution, while the remanence of hysteresis loops displays a two-fold one. The competition between the first and second magnetocrystalline anisotropies may result in the switching of in-plane easy axis of the system. Combining the FMR and VSM measurements, the magnetization reversal mechanism has also been determined.

Key words: magnetic anisotropy, magnetization reversal, ultrathin film

中图分类号:  (Magnetic anisotropy)

  • 75.30.Gw
75.70.Ak (Magnetic properties of monolayers and thin films) 68.55.-a (Thin film structure and morphology)