中国物理B ›› 2016, Vol. 25 ›› Issue (7): 77306-077306.doi: 10.1088/1674-1056/25/7/077306

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

Anisotropic transport properties in the phase-separated La0.67Ca0.33MnO3/NdGaO3 (001) films

Hong-Rui Zhang(张洪瑞), Yuan-Bo Liu(刘渊博), Shuan-Hu Wang(王拴虎), De-Shun Hong(洪德顺), Wen-Bin Wu(吴文彬), Ji-Rong Sun(孙继荣)   

  1. 1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Shanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University, Xi’an 710072, China;
    3 Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China and High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230026, China
  • 收稿日期:2016-02-19 修回日期:2016-04-13 出版日期:2016-07-05 发布日期:2016-07-05
  • 通讯作者: Ji-Rong Sun E-mail:jrsun@iphy.ac.cn
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant Nos. 2011CB921801, 2012CB921403, and 2013CB921701) and the National Natural Science Foundation of China (Grant Nos. 11074285, 51372064, and 11134007).

Anisotropic transport properties in the phase-separated La0.67Ca0.33MnO3/NdGaO3 (001) films

Hong-Rui Zhang(张洪瑞)1, Yuan-Bo Liu(刘渊博)1, Shuan-Hu Wang(王拴虎)2, De-Shun Hong(洪德顺)1, Wen-Bin Wu(吴文彬)3, Ji-Rong Sun(孙继荣)1   

  1. 1 Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
    2 Shanxi Key Laboratory of Condensed Matter Structures and Properties, School of Science, Northwestern Polytechnical University, Xi’an 710072, China;
    3 Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China and High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230026, China
  • Received:2016-02-19 Revised:2016-04-13 Online:2016-07-05 Published:2016-07-05
  • Contact: Ji-Rong Sun E-mail:jrsun@iphy.ac.cn
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant Nos. 2011CB921801, 2012CB921403, and 2013CB921701) and the National Natural Science Foundation of China (Grant Nos. 11074285, 51372064, and 11134007).

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摘要：

The anisotropic transport property was investigated in a phase separation La0.67Ca0.33MnO3 (LCMO) film grown on (001)-oriented NdGaO3 (NGO) substrate. It was found that the resistivity along the b-axis is much higher than that along the a-axis. Two resistivity peaks were observed in the temperature dependent measurement along the b-axis, one located at 91 K and the other centered at 165 K. Moreover, we also studied the response of the resistivities along the two axes to various electric currents, magnetic fields, and light illuminations. The resistivities along the two axes are sensitive to the magnetic field. However, the electric current and light illumination can influence the resistivity along the b-axis obviously, but have little effect on the resistivity along the a-axis. Based on these results, we believe that an anisotropic-strain-controlled MnO6 octahedra shear-mode deformation may provide a mechanism of conduction filaments paths along the a-axis, which leads to the anisotropic transport property.

关键词: electronic transport, magnetic field, electric currents, light illuminations

Abstract:

The anisotropic transport property was investigated in a phase separation La0.67Ca0.33MnO3 (LCMO) film grown on (001)-oriented NdGaO3 (NGO) substrate. It was found that the resistivity along the b-axis is much higher than that along the a-axis. Two resistivity peaks were observed in the temperature dependent measurement along the b-axis, one located at 91 K and the other centered at 165 K. Moreover, we also studied the response of the resistivities along the two axes to various electric currents, magnetic fields, and light illuminations. The resistivities along the two axes are sensitive to the magnetic field. However, the electric current and light illumination can influence the resistivity along the b-axis obviously, but have little effect on the resistivity along the a-axis. Based on these results, we believe that an anisotropic-strain-controlled MnO6 octahedra shear-mode deformation may provide a mechanism of conduction filaments paths along the a-axis, which leads to the anisotropic transport property.

Key words: electronic transport, magnetic field, electric currents, light illuminations

中图分类号:  (Magnetoresistance)

  • 73.43.Qt
75.47.-m (Magnetotransport phenomena; materials for magnetotransport) 81.40.Rs (Electrical and magnetic properties related to treatment conditions) 73.50.Pz (Photoconduction and photovoltaic effects)