Anisotropic transport properties of charge-ordered La_(5/8-y)Pr_yCa_(3/8)MnO_3(y= 0.43) film

作     者：刘渊博 王拴虎 孙继荣 沈保根 

作者机构：Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2015年第24卷第5期

页      面：535-540页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Knowledge Innovation Project of the Chinese Academy of Sciences and the National Basic Research Program of China 

主　　题：anisotropy manganites phase separation strain field 

摘      要：The anisotropic resistances along [001] and [1-10] axes are investigated for an La5/8-yPryCa3/8MnO3 （y = 0.43） （LPCMO） film grown on （110）-oriented LaAlO3 substrate. It is found that the charge order （CO） transition is much stronger and the resistance is larger along the [001] direction than that along the [1-10] direction. Special attention has been paid to the different effects of a magnetic field on the resistances of the two axes. The resistance is more susceptible to the magnetic field along the [001] direction compared with that along the [1-10] direction. Our results demonstrate that the anisotropic transport properties can be ascribed to the intrinsic anisotropic strain field in the film, which changes the shape of metallic domains for the phase separation manganite film. We also provide a feasible method to rule out the Joule heat effect from the electric current effect. This could be useful for future construction and application of materials and devices.