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Fe-氧化物薄膜的室温低场正磁电阻和高场负磁电阻 被引量:2

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摘要 采用对靶溅射技术制备了多相共存的Fe-氧化物薄膜.X射线衍射和X射线光电子能谱的测试表明薄膜存在有多相:Fe,Fe3O4,γ-Fe2O3,FeO.高分辨透射电子显微镜结果表明薄膜由柱状颗粒结构组成,其中核心是未氧化的Fe,外壳为Fe的氧化物.在室温时,低场正磁阻和高场负磁阻共存于Fe-氧化物薄膜中,利用壳层模型给出了初步解释.非线性电流-电压曲线和光生伏特效应进一步验证了薄膜的隧穿电导特性.
出处 《科学通报》 EI CAS CSCD 北大核心 2007年第7期752-755,共4页 Chinese Science Bulletin
基金 国家自然科学基金项目(批准号:50672132 60576015) 教育部科学技术研究重点项目(批准号:107020)资助
关键词 磁电阻 磁性 薄膜
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