Effect of Mn Substitution for Multiferroic BiFeO3 Probed by High-Resolution Soft-X-ray Spectroscopy

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概要

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• The electronic structures of BiFeO3 (BF) and Mn-doped BiFeO3 [BF(Mn)] have been studied by X-ray absorption spectroscopy (XAS) and soft-X-ray emission spectroscopy (SXES). BF and BF(Mn) have a mixed valence state of Fe2+ and Fe3+. Their valence band is mainly composed of the O 2p state hybridized with the majority-spin t2g and eg orbitals of Fe 3d state. The conduction band is composed of the minority-spin t2g and eg orbitals of Fe 3d. The band gaps of BF and BF(Mn) are estimated to be 1.3 eV and 2.7 eV, respectively. The increase in band gap with Mn substitution contributes to a change in the bandwidth of the valence band.

• 2008-09-25

著者

• Yogo Toshinobu

  Ecotopia Science Institute Nagoya University

• Higuchi Tohru

  Department Of Applied Physics Faculty Of Science Tokyo Univ. Of Science

• ITOH Naoyuki

  EcoTopia Science Institute, Nagoya University

• SHIMURA Tetsuo

  EcoTopia Science Institute, Nagoya University

• Hattori Takeshi

  Department Of Applied Physics Faculty Of Science Science University Of Tokyo:(present)the Institute

• Sakamoto Wataru

  Ecotopia Science Institute And Department Of Molecular Design And Engineering Graduate School Of Eng

• Liu Yi-Sheng

  Advanced Light Source, Lawrence Berkeley National Laboratory, CA 94720, U.S.A.

• Yao Peng

  Advanced Light Source, Lawrence Berkeley National Laboratory, CA 94720, U.S.A.

• Glans Per-Anders

  Advanced Light Source, Lawrence Berkeley National Laboratory, CA 94720, U.S.A.

• Chang Chinglin

  Department of Physics, Tamkang University, Tamsui 251, Taiwan, R.O.C.

• Wu Ziyu

  Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

• Guo Jinghua

  Advanced Light Source, Lawrence Berkeley National Laboratory, CA 94720, U.S.A.

• Guo Jinghua

  Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.A.

• Yogo Toshinobu

  EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan

• Hattori Takeshi

  Department of Applied Physics, Tokyo University of Science, Tokyo 162-8601, Japan

• Itoh Naoyuki

  EcoTopia Science Institute, Nagoya University, Nagoya 464-8603, Japan

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