Large anisotropy in colossal magnetoresistance of charge orbital ordered epitaxial Sm0.5Ca0.5MnO3 films

Yunzhong Chen, J.R. Sun, J.L. Zhao, J. Wang, B.G. Shen, Nini Pryds

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We investigated the structure and magnetotransport properties of Sm0.5Ca0.5MnO3 (SCMO) films epitaxially grown on (011)-oriented SrTiO3 substrates, which exhibited clear charge/orbital ordering transition. A significant anisotropy of ~1000 in the colossal magnetoresistance (CMR) effect was observed in the films with a thickness between 50 and 80 nm, which was distinctly different from the basically isotropic CMR effect in bulk SCMO. The large anisotropy in the CMR can be ascribed to the intrinsic asymmetric strain in the film, which plays an important role in tuning the spin–orbit coupling in manganite films. The origin of the peculiar CMR effect is discussed.
    Original languageEnglish
    JournalJournal of Physics: Condensed Matter
    Volume21
    Pages (from-to)442001
    ISSN0953-8984
    DOIs
    Publication statusPublished - 2009

    Keywords

    • Magnetic refrigeration
    • Fuel Cells and hydrogen

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