中国物理B ›› 2015, Vol. 24 ›› Issue (5): 57304-057304.doi: 10.1088/1674-1056/24/5/057304

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Anisotropic transport properties of charge-ordered La5/8-yPryCa3/8MnO3 (y=0.43) film

刘渊博, 王拴虎, 孙继荣, 沈保根   

  1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2014-12-06 修回日期:2015-01-20 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:

    Project Project of the Chinese Academy of Sciences and the National Basic Research Program of China.

Anisotropic transport properties of charge-ordered La5/8-yPryCa3/8MnO3 (y=0.43) film

Liu Yuan-Bo (刘渊博), Wang Shuan-Hu (王拴虎), Sun Ji-Rong (孙继荣), Shen Bao-Gen (沈保根)   

  1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2014-12-06 Revised:2015-01-20 Online:2015-05-05 Published:2015-05-05
  • Contact: Sun Ji-Rong E-mail:jrsun@iphy.ac.cn
  • About author:73.50.Bk; 73.61.Cw; 73.50.Fq
  • Supported by:

    Project Project of the Chinese Academy of Sciences and the National Basic Research Program of China.

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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.

关键词: anisotropy, manganites, phase separation, strain field

Abstract:

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.

Key words: anisotropy, manganites, phase separation, strain field

中图分类号:  (General theory, scattering mechanisms)

  • 73.50.Bk
73.61.Cw (Elemental semiconductors) 73.50.Fq (High-field and nonlinear effects)