为更好的构建远程教育平台,解决目前所面临的技术难题,开发低成本、高效率的远程教育系统成为市场的一大热点,FLASH公司推出的Flash Media Server2技术为实现这一目标提供了强有力的支持,应用该技术可以开发出功能完善、易于操作、成本...为更好的构建远程教育平台,解决目前所面临的技术难题,开发低成本、高效率的远程教育系统成为市场的一大热点,FLASH公司推出的Flash Media Server2技术为实现这一目标提供了强有力的支持,应用该技术可以开发出功能完善、易于操作、成本较低的远程教育系统。展开更多
The rotational anisotropies in the exchange bias structures of ferromagnetism/antiferromagnetism 1/antiferro- magnetism 2 are studied in this paper. Based on the model, in which the antiferromagnetism is treated with ...The rotational anisotropies in the exchange bias structures of ferromagnetism/antiferromagnetism 1/antiferro- magnetism 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 ferromag- netism （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 anti- ferromagnetic layer and exhibits oscillatory behaviour. In addition, we find that the temperature-dependent rotational anisotropy value is in good agreement with the experimental result.展开更多
基金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）. 0ne of the authors, Hu Jingo-Guo is supported by the China Scholarship Council to work as a visiting scholar at the University of Western Australia.
文摘The rotational anisotropies in the exchange bias structures of ferromagnetism/antiferromagnetism 1/antiferro- magnetism 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 ferromag- netism （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 anti- ferromagnetic layer and exhibits oscillatory behaviour. In addition, we find that the temperature-dependent rotational anisotropy value is in good agreement with the experimental result.
