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Magnetization and Electric Properties of Pr-doped ZnO

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Abstract

Magnetic susceptibility of ZnO-varistors doped with Pr-ion was measured to elucidate the valence state of the Pr-ion and the effect of thermal treatment. Magnetic susceptibility χ(T) of the Pr-ion obeyed Curie-Weiss law, from which its valence state was estimated. The valence state of the Pr-ion varied with annealing condition of specimens, and it was indicated that the Pr-ion in ZnO ceramics was more reducible in comparison with pure \hboxPrOx ceramics. Nonlinear current-voltage characteristics was diminished with the reduction of the valence state of Pr ions. According to Auger electron spectra, the Pr-ions segregated at grain boundaries in ZnO ceramics.

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Authors and Affiliations

  1. Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo, 152-8552, Japan

    Naoki Ohashi

  2. Department of Inorganic Materials, Faculty of Engineering, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo, 152-8552, Japan

    Shun Mitarai & Osamu Fukunaga

  3. National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan

    Junzo Tanaka

Authors
  1. Naoki Ohashi
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  2. Shun Mitarai
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  3. Osamu Fukunaga
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  4. Junzo Tanaka
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Ohashi, N., Mitarai, S., Fukunaga, O. et al. Magnetization and Electric Properties of Pr-doped ZnO. Journal of Electroceramics 4 (Suppl 1), 61–68 (1999). https://doi.org/10.1023/A:1009938106039

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