Electric polarization, magnetoelectric effect, and orbital state of a layered iron oxide with frustrated geometry

A. Nagano, M. Naka, J. Nasu, S. Ishihara

研究成果: Article査読

102 被引用数 (Scopus)

抄録

A layered iron oxide RFe2O4 (R denotes rare-earth-metal elements) is an exotic dielectric material with charge-order (CO) driven electric polarization and magnetoelectric effect caused by spin-charge coupling. In this paper, a theory of electronic structure and dielectric property in RFe2O4 is presented. Charge frustration in paired-triangular lattices allows a charge imbalance without inversion symmetry. Spin frustration induces reinforcement of this polar CO by a magnetic ordering. We also analyze an orbital model for the Fe ion which does not show a conventional long-range order.

本文言語English
論文番号217202
ジャーナルPhysical Review Letters
99
21
DOI
出版ステータスPublished - 2007 11 19
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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