多铁性La_(0.7)Sr_(0.3)MnO_3/PMN-PT复合薄膜的制备及表征  

Preparation and Characterization of Multiferroic La_(0.7)Sr_(0.3)MnO_3/PMN-PT Composite Thin Films

作　　者：苟喜成[1] 冯明[1] 刘鑫鑫[1] 李海波[1] 

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2012年第2期29-31,共3页Journal of Jilin Normal University:Natural Science Edition

基　　金：吉林省科技发展计划项目(20100179)

摘　　要：采用溶胶-凝胶法在Pt/Ti/SiO2/Si基片上制备了La0.7Sr0.3MnO3/PMN-PT(LSMO/PMN-PT)复合薄膜,利用X射线衍射(XRD)、原子力显微镜(AFM)、铁电性能综合测试仪、振动样品磁强计(VSM)对样品的结构、表面形貌以及铁电性能、磁性进行了分析.结果表明,LSMO/PMN–PT复合薄膜750℃退火处理后,所有X射线衍射峰均为样品特征峰,无扩散现象,没有新相生成;薄膜表面平整、致密、颗粒分布均匀;复合薄膜表现出了明显的铁电和铁磁性能.Multiferroic La0.7Sr0.3MnO3/PMN-PT（LSMO/PMN-PT） Composite films were prepared on Pt/Ti/SiO2/Si substrate via sol-gel spin-coating method.The structure,surface topography,ferroelectric and magnetic properties were characterized by X-ray diffraction（XRD）,atomic force microscope（AFM）,ferroelectric tester and vibrating sample magnetometer（VSM）.The results show that all the XRD peaks corresponding to LSMO and PMN-PT compositional phases,and there exists no chemical reaction or phase diffusion between the LSMO and PMN-PT phases after annealing at 750 ℃.AFM investigation shows that the films have a smooth surface with densely packed uniform grains.The composite thin films exhibit evident ferroelectric and ferromagnetic properties.

关 键 词：多铁性 复合薄膜 铁电性 磁性 溶胶–凝胶法 

分 类 号：O484.5[理学—固体物理]