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Multiple Stable States with In-Plane Anisotropy in Ultrathin YMnO3 Films

Authors

  • Zhigao Sheng,

    Corresponding author
    1. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan)
    • Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan).
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  • Naoki Ogawa,

    1. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan)
    2. CREST, Japan Science and Technology Agency, 4 – 1-8 Honcho, Kawaguchi, Saitama 332 – 0012 (Japan)
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  • Yasushi Ogimoto,

    1. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan)
    2. CREST, Japan Science and Technology Agency, 4 – 1-8 Honcho, Kawaguchi, Saitama 332 – 0012 (Japan)
    3. Fuji Electric Holdings Co., Ltd.1, Fuji-machi, Hino-city, Tokyo 191 – 8502 (Japan)
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  • Kenjiro Miyano

    Corresponding author
    1. Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan)
    2. CREST, Japan Science and Technology Agency, 4 – 1-8 Honcho, Kawaguchi, Saitama 332 – 0012 (Japan)
    • Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, Komaba, Meguro-ku, Tokyo 153 – 8904 (Japan).
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Abstract

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Coherent epitaxial YMnO3 ultrathin films have been built and their symmetries were studied using second harmonic generation technique. The underlying symmetry, trigonality, was revealed by the pseudomorphic strain effect and a new in-plane component with six-fold symmetry emerges in addition to usual polarization along c-axis. Its in-plane anisotropy provides possible multiple states which is significant for its potential applications.

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