溶胶-凝胶法制备的Co_(0.7)Fe_(2.3)O_4纳米晶薄膜结构与磁性  

Structure and magnetic properties of nanocrystalline Co_(0.7)Fe_(2.3)O_4 films synthesized by the sol-gel technique

作　　者：李雁[1] 方庆清[1] 刘艳美[1] 吕庆荣[1] 尹平[1] 

机构地区：[1]安徽大学物理与材料科学学院安徽省信息材料与器件重点实验室

出　　处：《安徽大学学报（自然科学版）》2006年第6期53-56,共4页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省2005年度重点科研基金资助项目(05022045);安徽省教育厅青年教师基金资助项目(05010210)

摘　　要：采用柠檬酸溶胶-凝胶法在玻璃衬底上制备了钴铁氧体Co0.7Fe2.3O4纳米晶薄膜．用X射线衍射仪、振动样品磁强计对不同热处理温度样品的结构及磁性进行了测量与分析．测量结果表明，退火400℃时样品已生成单一的尖晶石结构，晶粒尺寸变化范围在15—33nm之间，样品的磁性能强烈地依赖于退火温度的变化；550℃时退火样品获得最大矫顽力1475Oe Co0.7Fe2.3O4薄膜还具有平行膜面方向的择优取向．Co0.7Fe2.3O4 ferrite films were synthesized on glass substrates by the sol- gel technique. The magnetic properties and microstructure were measured and analyzed by vibrating sample magnetometer and X - ray diffractometer patterns. The results revealed that the sample annealed at 400℃ has a spinel single - phase. The variety of grain sizes is from 15 nm to 33 nm. The magnetic properties of samples are strongly depended on annealing temperature. The maximum coercivity of 1475Oe is obtained for Co0.7Fe2.3O4 films annealed at 550℃. Co0.7Fe2.3O4 films exhibit the preferred orientation parallel to its plane.

关 键 词：溶胶-凝胶法 Co0.7Fe2.3O4薄膜 磁性 结构 

分 类 号：TM277.1[一般工业技术—材料科学与工程]