Studies on defect structures of (La,Sr)2NiO4 by using X-ray absorption spectroscopy

Toshiaki Ina, Yuki Orikasa, Tomokazu Fukutsuka, Koji Amezawa, Tatsuya Kawada, Yoshiharu Uchimoto

研究成果: Conference contribution

抄録

Ni K-edge X-ray absorption spectroscopy was applied to investigate the electronic and defect structures of La2-xSrxNiO 4±δ (x = 0-1.0) annealed under various oxygen partial pressures. X-ray absorption near edge structure (XANES) indicated that the mean valence of Ni ions increased by increasing Sr contents and oxygen partial pressure, accompanied by variation of oxygen nonstoichiometry, in the composition range having excess oxygens and oxygen vacancies. Ni L-edge XANES of La2-xSrxNiO4±δ were used to decide the valence state and the spin state of Ni ions. By increasing Sr contents and oxygen partial pressure, it was found that Ni(II) ions decreased and the low spin state of Ni(III) ions increased.

本文言語English
ホスト出版物のタイトルECS Transactions - Ionic and Mixed Conducting Ceramics 6 - 213th ECS Meeting
ページ195-200
ページ数6
26
DOI
出版ステータスPublished - 2008 12 1
イベントIonic and Mixed Conducting Ceramics 6 - 213th ECS Meeting - Phoenix, AZ, United States
継続期間: 2008 5 182008 5 23

出版物シリーズ

名前ECS Transactions
番号26
13
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

Other

OtherIonic and Mixed Conducting Ceramics 6 - 213th ECS Meeting
国/地域United States
CityPhoenix, AZ
Period08/5/1808/5/23

ASJC Scopus subject areas

  • 工学(全般)

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