Effects of TbFeCo Underlayers on Magnetic Properties of CoFe_2O_4 Thin Films  

作　　者：金沈贤 钟智勇 任学恒 唐晓莉 张怀武 

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices , University of Electronic Science andTechnology of China

出　　处：《Journal of Rare Earths》2007年第S1期194-197,共4页稀土学报（英文版）

基　　金：the National Natural Science Foundation of China (60490296 ,60671029 ,90306015)

摘　　要：Cobalt ferrite thin films were deposited on TbFeCo(10 nm)/Si(100) and Si(100) substrates at a substrate temperature of 350 ℃ by RF magnetron sputtering. The heat treated films were analyzed by Vibrating Sample Magnetometer (VSM) and X-Ray Photoelectron Spectroscopy (XPS). Results showed that all films had high coercivity and perpendicular anisotropy especially for the films deposited on TbFeCo underlayer. TbFeCo underlayers increase the coercivity, magnetization and remanence ratio of CoFe2O4 films, films on TbFeCo underlayer had coercivity and magnetization as high as 832×103 A·m-1 and 450×103 A·m-1, and its romance ratio reaches 0.9, which was related to the Tb3+ diffusion from the underlayer into the film.Cobalt ferrite thin films were deposited on TbFeCo(10 nm)/Si(100) and Si(100) substrates at a substrate temperature of 350 ℃ by RF magnetron sputtering. The heat treated films were analyzed by Vibrating Sample Magnetometer (VSM) and X-Ray Photoelectron Spectroscopy (XPS). Results showed that all films had high coercivity and perpendicular anisotropy especially for the films deposited on TbFeCo underlayer. TbFeCo underlayers increase the coercivity, magnetization and remanence ratio of CoFe2O4 films, films on TbFeCo underlayer had coercivity and magnetization as high as 832×103 A·m-1 and 450×103 A·m-1, and its romance ratio reaches 0.9, which was related to the Tb3+ diffusion from the underlayer into the film.

关 键 词：cobalt ferrite magnetic properties COERCIVITY MAGNETIZATION remanence ratio rare earths 

分 类 号：TM271[一般工业技术—材料科学与工程]