The rotational anisotropies in the ferromagnetism/antiferromagnetism 1/ antiferromagnetism 2 exchange bias structures
Hu Jing-Guo (胡经国)ab, R L Stampsb
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
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.
Received: 16 November 2005
Revised: 06 April 2006
Accepted manuscript online:
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: 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
Cite this article:
Hu Jing-Guo (胡经国), R L Stamps The rotational anisotropies in the ferromagnetism/antiferromagnetism 1/ antiferromagnetism 2 exchange bias structures 2006 Chinese Physics 15 1595
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