【摘要】 本文报道了有关溅射氧化铁薄膜磁性能的系统研究,特别着重于矫顽力的温度依赖关系和矫顽力随不同氧化铁相的变化。从理论分析与实验测量结果的对比中,给出了形状各向异性、磁晶各向异性及应力各向异性各自对Fe₃O₄薄膜、γ-Fe₂O₃薄膜及二者混合相薄膜的贡献,并且得到了Fe₃O₄薄膜和γ-Fe₂O₃薄膜的磁晶各向异性常数K₁的温度依赖关系曲线。更多还原

【Abstract】 The study on magnetic properties of RF sputtered iron oxide thin films was carried out systematically. More specifically, the temperature dependence （77-500 K） of the coercivity and the variation of coercivity with different iron oxide phases such as the as-sputtered Fe₃O4, partially transformed Fe₃O₄/（γ-Fe2O₃）, and γ-Fe₂O3, were investigated.Comparing the theoretical analyses with the experimental results, the contributions to the coercivity from shape anisotropy, magnetocrystalline anisotropy, and stress-induced magnetic anisotropy were obtained separately. And the first-order crystalline anisotropy constant K₁ vs. temperature for Fe₃O₄ and γ-Fe₂O₃ films was derived from M_s,（T） and HC（T） over the temperature range of 100-500 K.更多还原