摘要
采用溶胶-凝胶法(sol-gel)制备了名义组分为La0.75Sr0.25-xCuxMnO3(x=0,0.03,0.05,0.07)的块体样品.采用DMAX-RB(12 kW)旋转阳极X射线衍射仪对材料进行了晶体结构的研究.结果显示,样品呈单相菱面体钙钛矿结构.通过研究样品的磁特性及庞磁电阻性质发现,在掺入适量Cu离子后,样品的居里温度TC随Cu含量增加逐渐降低,而样品的庞磁电阻效应有了明显的改善.
A series of bulk samples of La0.75Sr0.25-xCuxMnO3（x=0,0.03,0.05,0.07） were prepared with sol-gel method. The phase identification Rigaku MAX-RB diffractometer. The res ovskite structure without any other secon increase of Cu and the magnetoresistance of samples was carried out by the X-ray diffraction （XRD） with a ults indicate that the materials are a single phase rhombohedral perdary phase. The Curie temperature of the samples decreased with the properties of the samples have been improved remarkably.
出处
《河北师范大学学报（自然科学版）》
CAS
北大核心
2008年第6期749-752,共4页
Journal of Hebei Normal University：Natural Science
基金
河北省自然科学基金(E2006000168)
河北省教育厅科研计划项目(2005358)
关键词
钙钛矿结构
溶胶-凝胶法
磁电阻
perovskite structure
sol-gel method
magnetoresistance
