Ferroelectricity from iron valence ordering in the charge-frustrated system LuFe2O4

Naoshi Ikeda (), Hiroyuki Ohsumi, Kenji Ohwada, Kenji Ishii, Toshiya Inami, Kazuhisa Kakurai, Youichi Murakami, Kenji Yoshii, Shigeo Mori, Yoichi Horibe and Hijiri Kitô
Additional contact information
Naoshi Ikeda: Japan Synchrotron Radiation Research Institute
Hiroyuki Ohsumi: Japan Synchrotron Radiation Research Institute
Kenji Ohwada: Japan Atomic Energy Research Institute
Kenji Ishii: Japan Atomic Energy Research Institute
Toshiya Inami: Japan Atomic Energy Research Institute
Kazuhisa Kakurai: Japan Atomic Energy Research Institute
Youichi Murakami: Tohoku University
Kenji Yoshii: Japan Atomic Energy Research Institute
Shigeo Mori: Osaka Prefecture University
Yoichi Horibe: Osaka Prefecture University
Hijiri Kitô: National Institute of Advanced Industrial Science and Technology

Nature, 2005, vol. 436, issue 7054, 1136-1138

Abstract: In control Ferroelectric materials have a spontaneous electric polarization and are widely used in electronic devices including memories. Conventional ferroelectricity arises from ionic displacement, but an alternative mechanism has been proposed based on ordered electrons. Evidence for the latter behaviour has now been found in a mixed valence oxide. This type of ferroelectricity may offer potential for devices with enhanced controllability.

Date: 2005
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DOI: 10.1038/nature04039

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