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题名: Structural and Magnetic Characterization of Fe3O4/Mn3O4 Superlattices
作者: Chern, G.;Horng, Lance;Lin, M. Z.;Li, S. M.;Lee, D. S.;Hou, T. Y.;Tai, M. F.;Wu, Te-Ho
贡献者: 物理學系
关键词: Superlattices;Ferrimagnetic/ferrimagnetic coupling;Magnetic transition;Molecular beam epitaxy (MBE);Crystalline anisotropy
日期: 2000-02
上传时间: 2013-02-05T02:18:05Z
出版者: Elsevier
摘要: High-quality ferrimagnetic superlattices Fe3O4/Mn3O4 were grown on MgO(0 0 1) substrates by molecular beam epitaxy. The modulation coherency and interface sharpness are characterized by reflection high-energy electron diffraction and X-ray diffraction. Magnetization as a function of the applied field (50 kOe) and temperature (20–300 K) was measured. The magnetic response shows strong dependence on the modulation wavelength. A combined single magnetic transition temperature is predicted to be ∼600 K for samples with modulation wavelength <43 Å. An abrupt decrease of the magnetization is found below 50 K for some superlattices. This feature may be induced by the anisotropic energy related to the tetragonal symmetry of Mn3O4.
關聯: Journal of Magnetism and Magnetic Materials, 209(1-3): 138-141
显示于类别:[物理學系] 期刊論文


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