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

• 作者: 刘渊博 吴文彬 孙继荣 张洪瑞 洪德顺 王拴虎
• 来源期刊: 中国物理B（英文版）
• 关键词: electronic transport magnetic field electric currents light illuminations
• 年，卷（期）: 2016,（7）
• 页码范围: 077306-1-077306-6
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/25/7/077306

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 infl uence 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.