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

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Title: Anisotropic transport properties in the phase-separated La0.67Ca0.33MnO3/NdGaO3 (001) films.
Authors: Hong-Rui Zhang1, Yuan-Bo Liu1, Shuan-Hu Wang2, De-Shun Hong1, Wen-Bin Wu3, Ji-Rong Sun1,4 jrsun@iphy.ac.cn
Source: Chinese Physics B. Jul2016, Vol. 25 Issue 7, p1-1. 1p.
Subjects: Magnetic properties of lanthanum calcium manganese oxide, Anisotropy, Phase separation, Deformations (Mechanics), Magnetic fields
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. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
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. [ABSTRACT FROM AUTHOR]
ISSN:16741056
DOI:10.1088/1674-1056/25/7/077306