高分子辅助溶胶-凝胶法制备BiFe1-xCoxO3薄膜及其性能  

Preparation of BiFe_(1-x)Co_xO_3 Film by a Polymer-Assisted Sol-Gel Process and Its Properties

作　　者：陈吉利[1] 赵立峰[1] 许加阳[1] 黄正银[1] 黄宁湘[1] 赵勇[1,2] 

机构地区：[1]西南交通大学,四川成都610031 [2]University of New South Wales,Sydney 2052 NSW,Australia

出　　处：《稀有金属材料与工程》2010年第9期1668-1671,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50588201);国家重大基础研究“973”项目(2007CB616906);长江计划创新团队(PCSIRT)(IRT0751)

摘　　要：采用高分子辅助溶胶-凝胶法在ITO/玻璃衬底上制备纯的及10%B位Co替代的BiFeO3(BFO)薄膜。XRD研究表明,两薄膜均为纯相的菱方六面体状扭曲的钙钛矿结构。SEM测观表明,Co替代有利于改善BFO薄膜的致密性和平整度。铁电测试结果表明,Co取代薄膜的铁电性有明显增强,同时饱和极化电场强度增加,漏电流减小。磁性测试表明,BFCO薄膜磁性明显增强。Pure BiFeO3 (BFO) film and 10%Co-doped BiFeO3 (BFCO) film were deposited on indium tin oxide (ITO)/glass substrates by a polymer-assisted sol-gel process. XRD results confirm that both the films are warping rhombohedral perovskite structure. SEM observation indicates that BFCO film possesses smoother surface and less pinhole than the pure BFO film. Ferroelectric tests show that substitution of Co enhances obviously ferroelectricity and remanent polarization with decrease of leakage current density. The magnetic tests indicate that the magnetic properties of BFCO film are enhanced compared with that of BFO film.

关 键 词：高分子 辅助 溶胶 凝胶法制备 薄膜磁性 性能 钙钛矿结构 玻璃衬底上 增强 铁电性 电场强度 磁性测试 测试结果 致密性 平整度 漏电流 六面体 BIFEO3 取代 扭曲 

分 类 号：TM22[一般工业技术—材料科学与工程]