Rotation of an electric polarization vector by rotating magnetic field in cycloidal magnet Eu0.55Y0.45MnO3

H. Murakawa, Y. Onose, F. Kagawa, S. Ishiwata, Y. Kaneko, Y. Tokura

研究成果: Article査読

55 被引用数 (Scopus)

抄録

To clarify the microscopic origin of the gigantic magnetoelectric effect in multiferroics, we have investigated the variation of an electric polarization (P) vector under a rotating magnetic field (H) for a cycloidal helimagnet Eu0.55Y0.45MnO3 as a canonical example. P rotates smoothly by rotating H around the magnetic propagation wave vector k, which can be well understood by the rotation of the conical spin structure around k. We also show that the rotation process of the conical spin structure under H is crucial for the retention or reversal of the spin helicity or equivalently of the direction of P.

本文言語English
論文番号197207
ジャーナルPhysical Review Letters
101
19
DOI
出版ステータスPublished - 2008 11 6
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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