Effects of oxygen annealing on dielectric properties of LuFeCuO4

Yoji Matsuo, Muneyasu Suzuki, Yuji Noguchi, Takeshi Yoshimura, Norifumi Fujimura, Kenji Yoshii, Naoshi Ikeda, Shigeo Mori

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We investigated the effect of oxygen annealing on dielectric properties of LuFeCuO4 mainly by dielectric measurements and transmission electron microscopy experiments. It was found that the leakage current density decreases with high-pressure oxygen annealing and the size of nanodomains with orientational polarization increases, which is characterized by the short-range ordering of Fe3+ and Cu2+ ions on a triangular lattice. In addition, the absolute value of relative permittivity ε′ decreases with oxygen annealing and ε′ exhibits a broad peak in the temperature window between room temperature and 550K, which is similar to that observed in relaxor ferroelectric materials. The present experimental results suggest that the number of oxygen vacancies has a crucial effect on dielectric properties of LuFeCuO4.

Original languageEnglish
Pages (from-to)8464-8467
Number of pages4
JournalJapanese journal of applied physics
Volume47
Issue number11
DOIs
Publication statusPublished - Nov 14 2008

Keywords

  • Dielectric material
  • Oxygen annealing
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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