Magnetotransport properties of La0.67Ca0.33MnO3//La0.67Sr0.33MnO3 bilayers  

作　　者：丰家峰 赵昆 黄延红 赵见高 韩秀峰 詹文山 黄康权 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China [2]Spintronics Laboratory, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China [3]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China [4]Department of Physics, The Chinese University of Hong Kong, Hong Kong

出　　处：《Chinese Physics B》2005年第9期1879-1881,共3页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos 50371102 and 10334070）, Hi-Tech Research and Development Program of China （Grant No 2004AA32G090）, the Research Foundation of Shandong Provincial Education Department of China （Grant No 03A05）, the Hong Kong Research Grant Council, and China Postdoctoral Science Foundation.

摘　　要：The perovskite bilayers La0.67Ca0.33MnO3 （LCMO） （100 nm） / La0.67Sr0.33MnO3（LSMO） （100 nm） and LSMO （100 nm） / LCMO （100 nm） are fabricated by a facing-target sputtering technique. Their transport and magnetic properties are investigated. It is found that the transport properties between them are different obviously due to distinguishable structures, and the different lattice strains in both films result in the difference of metal-to-insulator transition. Only single-step magnetization loop appears in our bilayers from 5K to 320K, and the coercive force of LSMO/LCMO varies irregularly with a minimum ～ 2387A/m which is lower than that of LCMO and LSMO single layer films. The behaviour is explained by some magnetic coupling.The perovskite bilayers La0.67Ca0.33MnO3 （LCMO） （100 nm） / La0.67Sr0.33MnO3（LSMO） （100 nm） and LSMO （100 nm） / LCMO （100 nm） are fabricated by a facing-target sputtering technique. Their transport and magnetic properties are investigated. It is found that the transport properties between them are different obviously due to distinguishable structures, and the different lattice strains in both films result in the difference of metal-to-insulator transition. Only single-step magnetization loop appears in our bilayers from 5K to 320K, and the coercive force of LSMO/LCMO varies irregularly with a minimum ～ 2387A/m which is lower than that of LCMO and LSMO single layer films. The behaviour is explained by some magnetic coupling.

关 键 词：MANGANITES magnetic coupling bilayer film 

分 类 号：O61[理学—无机化学]