Mechanism of lattice-distortion-induced electric-polarization flop in the multiferroic perovskite manganites

Masahito Mochizuki, Nobuo Furukawa

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We theoretically study a competition between two types of spin cycloids (ab-plane and bc-plane ones) in the multiferroic perovskite manganites, which is an origin of intriguing magnetoelectric phenomena in these compounds. Analysis of a microscopic model using the Monte-Carlo method reveals that their competition originates from a conflict between the single-ion anisotropy and the Dzyaloshinsky-Moriya interaction. It is demonstrated that the conflict can be controlled by tuning the second-neighbor spin exchanges through the GdFeO 3-type distortion, which leads to a cycloidal-plane flop from ab to bc observed in the solid-solution systems like Eu 1-xY xMnO 3 and Gd 1-xTb xMnO 3 with increasing x.

Original languageEnglish
Article number053704
JournalJournal of the Physical Society of Japan
Issue number5
Publication statusPublished - 2009 May
Externally publishedYes



  • Dzyaloshinskii-moriya interaction
  • Mn perovskite
  • Multiferroics
  • Phase diagram

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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