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

C. L. Lu*, Y. Y. Wu, Z. C. Xia, S. L. Yuan, L. Chen, Z. M. Tian, J. M. Liu, T. Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We investigate epitaxial Pr0.65(Ca0.7Sr 0.3)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.

Original languageEnglish (US)
Article number122510
JournalApplied Physics Letters
Volume99
Issue number12
DOIs
StatePublished - Sep 19 2011

Bibliographical note

Funding Information:
This work was partly supported by the Singapore National Research Foundation, NSFC (Grant No. 11104090), and the Ministry of Education of China (Grant No. 309020). J.M.L. was supported by NSFC (Grant Nos. 50832002 and 11074113).

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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