Electronic structure of protonic conductor SrZr0.90M 0.10O3 (M = Y3+, Sc3+) probed by soft-X-ray spectroscopy

T. Higuchi, T. Tsukamoto, Hiroshige Matsumoto, T. Shimura, K. Yashiro, T. Kawada, J. Mizusaki, S. Shin, T. Hattori

Research output: Contribution to journalConference article

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Abstract

The electronic structure of protonic conductor SrZr1-xM xO3-δ (M = Y3+, Sc3+) has been studied by soft-X-ray spectroscopy. The valence band is mainly composed of O 2p state. The conduction band is composed of Zr 4d state. The holes and the acceptor level are observed at the top of valence band and just above the Fermi level (EF), respectively. In H2-annealed SrZr 1-xMxO3-δ (M = Y3+, Sc 3+), their intensities decrease and the hydrogen-induced level is created at just below EF. The energy separation between the bottom of the hydrogen-induced level and the top of valence band agrees with the activation energy estimated from the electrical conductivity.

Original languageEnglish
Pages (from-to)2435-2438
Number of pages4
JournalSolid State Ionics
Volume176
Issue number31-34
DOIs
Publication statusPublished - Oct 1 2005
Externally publishedYes
Event30th Symposium on Solid State Ionics in Japan -
Duration: Dec 1 2004Dec 3 2004

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All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

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