Carrier mobility of iron oxide nanoparticles supported on ferroelectrics studied by Mössbauer spectroscopy

T. Okamoto, Jun Kano, S. Nakamura, A. Fuwa, T. Otoyama, Y. Nakazaki, H. Hashimoto, J. Takada, M. Ito, Naoshi Ikeda

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Abstract

57Fe Mössbauer spectroscopy was performed on two types of Fe oxide nanoparticles supported on a typical ferroelectric, BaTiO3. It was found that the valence state of FeO nanoparticles changed to a mixed 2+/3+ state at high temperature where BaTiO3 shows paraelectric behaviour. We attribute this phenomenon to the fluctuation of electric dipoles which realizes carrier injection into the Fe oxides. This is the first report which discusses a dynamical valence state of transition metal oxides supported on ferroelectrics.

Original languageEnglish
Pages (from-to)147-152
Number of pages6
JournalHyperfine Interactions
Volume219
Issue number1-3
DOIs
Publication statusPublished - 2013

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Keywords

  • Electric dipole
  • Ferroelectric
  • Mössbauer spectroscopy
  • Nanoparticles

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Nuclear and High Energy Physics
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Okamoto, T., Kano, J., Nakamura, S., Fuwa, A., Otoyama, T., Nakazaki, Y., Hashimoto, H., Takada, J., Ito, M., & Ikeda, N. (2013). Carrier mobility of iron oxide nanoparticles supported on ferroelectrics studied by Mössbauer spectroscopy. Hyperfine Interactions, 219(1-3), 147-152. https://doi.org/10.1007/s10751-012-0687-3