中国物理B ›› 2006, Vol. 15 ›› Issue (7): 1595-1601.doi: 10.1088/1009-1963/15/7/037

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The rotational anisotropies in the ferromagnetism/antiferromagnetism 1/ antiferromagnetism 2 exchange bias structures

胡经国1, StampsRL2   

  1. (1)College of Physics Science and Technology, University of Yangzhou,Yangzhou 225002, China;School of Physics, M013, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; (2)School of Physics, M013, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
  • 收稿日期:2005-11-16 修回日期:2006-04-06 出版日期:2006-07-20 发布日期:2006-07-20
  • 基金资助:
    Project supported by the Science Foundation of Educational Commission of Jiangsu Province, China (Grant No 03KJB140153) and the State Key Program of Basic Research of China (Grant Nos 2001CB610602 and 10347118).One of the authors, Hu Jing-Guo is supporte

The rotational anisotropies in the ferromagnetism/antiferromagnetism 1/ antiferromagnetism 2 exchange bias structures

Hu Jing-Guo (胡经国)ab, R L Stampsb   

  1. a College of Physics Science and Technology, University of Yangzhou,Yangzhou 225002, China; b School of Physics, M013, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
  • Received:2005-11-16 Revised:2006-04-06 Online:2006-07-20 Published:2006-07-20
  • Supported by:
    Project supported by the Science Foundation of Educational Commission of Jiangsu Province, China (Grant No 03KJB140153) and the State Key Program of Basic Research of China (Grant Nos 2001CB610602 and 10347118).One of the authors, Hu Jing-Guo is supporte

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摘要： The rotational anisotropies in the exchange bias structures of ferromagnetism/antiferromagnetism 1/antiferromagnetism 2 are studied in this paper. Based on the model, in which the antiferromagnetism is treated with an Ising mean field theory and the rotational anisotropy is assumed to be related to the field created by the moment induced on the antiferromagnetic layer next to the ferromagnetic layer, we can explain why in experiments for ferromagnetism (FM)/antiferromagntism 1 (AFM1)/antiferromagnetism 2 (AFM2) systems the thickness-dependent rotational anisotropy value is non-monotonic, i.e. it reaches a minimum for this system at a specific thickness of the first antiferromagnetic layer and exhibits oscillatory behaviour. In addition, we find that the temperature-dependent rotational anisotropy value is in good agreement with the experimental result.

关键词: FM/AFM1/AFM2 trilayer, rotational anisotropy, exchange coupling

Abstract: The rotational anisotropies in the exchange bias structures of ferromagnetism/antiferromagnetism 1/antiferromagnetism 2 are studied in this paper. Based on the model, in which the antiferromagnetism is treated with an Ising mean field theory and the rotational anisotropy is assumed to be related to the field created by the moment induced on the antiferromagnetic layer next to the ferromagnetic layer, we can explain why in experiments for ferromagnetism (FM)/antiferromagntism 1 (AFM1)/antiferromagnetism 2 (AFM2) systems the thickness-dependent rotational anisotropy value is non-monotonic, i.e. it reaches a minimum for this system at a specific thickness of the first antiferromagnetic layer and exhibits oscillatory behaviour. In addition, we find that the temperature-dependent rotational anisotropy value is in good agreement with the experimental result.

Key words: FM/AFM1/AFM2 trilayer, rotational anisotropy, exchange coupling

中图分类号:  (Magnetic anisotropy)

  • 75.30.Gw
75.10.Hk (Classical spin models) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))