Electric and Magnetic Properties and Magnetoelectric Effect of the Ba_(0.8)Sr_(0.2)TiO_(3)/CoFe_(2)O_(4)Heterostructure Film by Radio-Frequency Magnetron Sputtering  

作　　者：WANG Ye-An WANG Yun-Bo RAO Wei GAO Jun-Xiong ZHOU Wen-Li YU Jun 王叶安;王耘波;饶伟;高俊雄;周文利;于军(School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074)

机构地区：[1]School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074

出　　处：《Chinese Physics Letters》2013年第4期185-188,共4页中国物理快报（英文版）

基　　金：the National Natural Science Foundation of China under Grant No 60971008;the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant No 200804870071.

摘　　要：A Ba_(0.8)Sr_(0.2)TiO_(3)/CoFe_(2)O_(4)layered heterostructure film was grown on a Pt/TiO_(2)/SiO_(2)/Si substrate by rf-magnetron sputtering.X-ray diffraction shows that the film consists of perovskite Ba_(0.8)Sr_(0.2)TiO_(3)and spinel CoFe_(2)O_(4)phases.The microstructures of the film were observed by a scanning electron microscope(SEM),showing good surface morphology and clear interfaces among the Ba_(0.8)Sr_(0.2)TiO_(3)film,the CoFe_(2)O_(4)film and the substrate.The variations of dielectric properties with frequency of the heterostructure film are investigated.The heterostructure film simultaneously displays distinct ferroelectricity and ferromagnetism.Moreover,an obvious magnetoelectric coupling effect was observed in the heterostructure film with a maximum magnetoelectric voltage coefficient of 5.0 mV·cm^(-1)Oe^(-1),which is about seven times larger than that of the Ba_(0.8)Sr_(0.2)TiO_(3)/CoFe_(2)O_(4)particulate composite ceramics in a previous report.

关 键 词：composite FILM (3) 

分 类 号：TB3[一般工业技术—材料科学与工程]