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Negative magnetostrictive magnetoelectric coupling of BiFeO3

Sanghyun Lee, M. T. Fernandez-Diaz, H. Kimura, Y. Noda, D. T. Adroja, Seongsu Lee, Junghwan Park, V. Kiryukhin, S.-W. Cheong, M. Mostovoy, and Je-Geun Park
Phys. Rev. B 88, 060103(R) – Published 21 August 2013
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Abstract

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.

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  • Received 1 June 2013

DOI:https://doi.org/10.1103/PhysRevB.88.060103

©2013 American Physical Society

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Subtle Atomic Shifts

Published 21 August 2013

Neutron diffraction experiments identify the way magnetic structure affects the electrical properties of an important multiferroic material.

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Authors & Affiliations

Sanghyun Lee1,2,3, M. T. Fernandez-Diaz4, H. Kimura5, Y. Noda5, D. T. Adroja6, Seongsu Lee7, Junghwan Park2,3, V. Kiryukhin8, S.-W. Cheong8, M. Mostovoy9, and Je-Geun Park1,2,10,*

  • 1Center for Functional Interfaces of Correlated Electron Systems, Institute for Basic Science, Seoul National University, Seoul 151-747, Korea
  • 2Center for Strongly Correlated Materials Research, Seoul National University, Seoul 151-742, Korea
  • 3Department of Physics, SungKyunKwan University, Suwon 440-746, Korea
  • 4Institut Laue-Langevin, Boîte Postale 156, 38042 Grenoble Cedex, France
  • 5Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
  • 6ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
  • 7Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Korea
  • 8Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA
  • 9Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
  • 10FPRD, Department of Physics & Astronomy, Seoul National University, Seoul 151-747, Korea

  • *jgpark10@snu.ac.kr

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Issue

Vol. 88, Iss. 6 — 1 August 2013

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