Hole-ion Mixed Conduction of Orientation-Controlled BaPrO3-δ Thin Film with Mixed Valence States

Tohru Higuchi; Asuka Oda; Takashi Tsuchiya; Takaaki Suetsugu; Naoya Suzuki; Shohei Yamaguchi; Makoto Minohara; Masaki Kobayashi; Koji Horiba; Hiroshi Kumigashira

doi:10.7566/JPSJ.84.114708

Hole-ion Mixed Conduction of Orientation-Controlled BaPrO3-δ Thin Film with Mixed Valence States

Tohru Higuchi, Asuka Oda, Takashi Tsuchiya, Takaaki Suetsugu, Naoya Suzuki, Shohei Yamaguchi, Makoto Minohara, Masaki Kobayashi, Koji Horiba, Hiroshi Kumigashira

研究成果: Article › 査読

3 被引用数 (Scopus)

抄録

An in-plane-oriented BaPrO_3-δ thin film with mixed valence states has been prepared on an Al₂O₃(0001) substrate by RF magnetron sputtering. With increasing crystallization temperature (T_sub), the lattice constant decreases and the orientation changes from the a-axis to the b-axis. The thin film prepared above T_sub = 800 °C exhibits a higher proton conductivity than bulk ceramics. The conductivity below 400 °C decreases with oxygen gas partial pressure, indicating the existence of hole-ion mixed conduction. The valence band consists of O 2p states hybridized with the Pr⁴⁺ (4f ⁰) and Pr³⁺ (4 f ¹L) states, which are closely related to the mixed conduction. The energy difference between the top of the valence band and the Fermi level corresponds to the activation energy of holes for the total conductivity below 400 °C.

本文言語	English
論文番号	114708
ジャーナル	journal of the physical society of japan
巻	84
号	11
DOI	https://doi.org/10.7566/JPSJ.84.114708
出版ステータス	Published - 2015 11 15
外部発表	はい

ASJC Scopus subject areas

Physics and Astronomy(all)

文献へのアクセス

10.7566/JPSJ.84.114708

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引用スタイル

Hole-ion Mixed Conduction of Orientation-Controlled BaPrO3-δ Thin Film with Mixed Valence States. / Higuchi, Tohru; Oda, Asuka; Tsuchiya, Takashi; Suetsugu, Takaaki; Suzuki, Naoya; Yamaguchi, Shohei; Minohara, Makoto; Kobayashi, Masaki; Horiba, Koji; Kumigashira, Hiroshi.

In: journal of the physical society of japan, Vol. 84, No. 11, 114708, 15.11.2015.

研究成果: Article › 査読

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AU - Suzuki, Naoya

AU - Yamaguchi, Shohei

AU - Minohara, Makoto

AU - Kobayashi, Masaki

AU - Horiba, Koji

AU - Kumigashira, Hiroshi

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