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Giant in-plane anisotropy in manganite thin films driven by strain-engineered double exchange interaction and electronic phase separation

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8 Author(s)
Lu, C. L. ; School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China ; Wu, Y. Y. ; Xia, Z. C. ; Yuan, S. L.
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We investigate epitaxial Pr0.65(Ca0.7Sr0.3)0.35MnO3 thin film grown on orthorhombic (110) NdGaO3 substrate which breaks the lattice symmetry and affects the phase separated ground state. As a result of the anisotropic substrate strain, giant in-plane magnetic and magnetotransport anisotropy are observed, which is related to the anisotropic coupling and competition between the double-exchange interaction and the Jahn-Teller distortion. Furthermore, the in-plane anisotropy shows a distinct enhancement near the metal-insulator transition, implying a significant contribution from the phase separation to the anisotropic transport behaviors.

Published in:

Applied Physics Letters  (Volume:99 ,  Issue: 12 )

Date of Publication:

Sep 2011

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