Spiral spin structures and origin of the magnetoelectric coupling in YMn2O5

J. H. Kim, S. H. Lee, S. I. Park, M. Kenzelmann, A. B. Harris, J. Schefer, J. H. Chung, C. F. Majkrzak, M. Takeda, S. Wakimoto, S. Y. Park, S. W. Cheong, M. Matsuda, H. Kimura, Y. Noda, K. Kakurai

研究成果: Article査読

40 被引用数 (Scopus)

抄録

By combining neutron four-circle diffraction and polarized neutron-diffraction techniques we have determined the complex spin structures of a multiferroic YMn2O5 that exhibits two ferroelectric phases at low temperatures. The obtained magnetic structure has spiral components in both the low-temperature ferroelectric phases that are magnetically commensurate and incommensurate, respectively. Among proposed microscopic theories for the magnetoelectric coupling, our results are consistent with both the spin-current mechanism and the magnetostriction mechanism. Our results also explain why the electric polarization changes at the low-temperature commensurate-to-incommensurate phase transition.

本文言語English
論文番号245115
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
78
24
DOI
出版ステータスPublished - 2008 12月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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