Negative magnetostrictive magnetoelectric coupling of BiFeO3

Sanghyun Lee, M. T. Fernandez-Diaz, H. Kimura, Y. Noda, D. T. Adroja, Seongsu Lee, Junghwan Park, Valery Kiryukhin, Sang-Wook Cheong, M. Mostovoy, Je Geun Park

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How magnetoelectric coupling actually occurs on a microscopic level in multiferroic BiFeO3 is not well known. By using high-resolution single crystal neutron diffraction techniques, we have determined the electric polarization of each individual element of BiFeO3, and concluded that magnetostrictive coupling suppresses the electric polarization at the Fe site below TN. This negative magnetoelectric coupling appears to outweigh the spin current contributions arising from the cycloid spin structure, which should produce positive magnetoelectric coupling.

Original languageEnglish (US)
Article number060103
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number6
StatePublished - Aug 21 2013

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Lee, S., Fernandez-Diaz, M. T., Kimura, H., Noda, Y., Adroja, D. T., Lee, S., Park, J., Kiryukhin, V., Cheong, S-W., Mostovoy, M., & Park, J. G. (2013). Negative magnetostrictive magnetoelectric coupling of BiFeO3. Physical Review B - Condensed Matter and Materials Physics, 88(6), [060103].