Large off-diagonal magnetoelectric coupling in the quantum paraelectric antiferromagnet EuTiO3

V. V. Shvartsman, P. Borisov, W. Kleemann, S. Kamba, Takuro Katsufuji

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    Abstract

    The third-order E2 H2 -type magnetoelectric (ME) response of polycrystalline EuTiO3 changes sign under magnetic bias and shows a large anomaly at the antiferromagnetic (AF)-paramagnetic phase boundary below TN ≈5.3 K. It is attributed to critical fluctuations of the AF order parameter reinforced by quantum paraelectric polar correlations. The underlying biquadratic spin-lattice coupling involves electric field induced Dzyaloshinskii-Moriya interaction as described within mean-field approximation. Single domaining by ME annealing (or cooling) significantly enhances the response by additional EH and E H2 effects.

    Original languageEnglish
    Article number064426
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume81
    Issue number6
    DOIs
    Publication statusPublished - 2010 Feb 23

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    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

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