Magnetically induced ferroelectricity in multiferroic compounds of RMn 2O5

H. Kimura, S. Kobayashi, S. Wakimoto, Y. Noda, K. Kohn

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22 Citations (Scopus)

Abstract

A review is given on the studies of microscopic magnetic properties and macroscopic dielectric properties as functions of temperature, magnetic field, and the variety of R3+ (R = rare-earth, Bi, and Y) ions in the multiferroic RMn2O5 compounds by neutron diffraction and dielectric measurements. We have observed successive dielectric and magnetic phase transitions, which concomitantly takes place and a so-called multiferroics is realized. In this system, the ferroelectricity is magnetically induced and the commensurate magnetism is indispensable to produce a spontaneous electric polarization. The microscopic origin of the magnetically induced ferroelectricity and the role of rare-earth magnetic moment for a colossal magnetoelectric effect in RMn2O5 will be discussed in the viewpoint of the magnetic structure.

Original languageEnglish
Pages (from-to)77-85
Number of pages9
JournalFerroelectrics
Volume354
Issue number1
DOIs
Publication statusPublished - 2007

Keywords

  • Antiferromagnetism
  • Colossal magnetoelectric effect
  • Ferroelectricity
  • Magnetic field
  • Multiferroics
  • Neutron diffraction
  • RMnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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