Synthesis and thermal stability of the solid solution A FeO2 (A = Ba, Sr, Ca)

Takafumi Yamamoto, Zhaofei Li, Cédric Tassel, Naoaki Hayashi, Mikio Takano, Masahiko Isobe, Yutaka Ueda, Kenji Ohoyama, Kazuyoshi Yoshimura, Yoji Kobayashi, Hiroshi Kageyama

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

We have studied the A-site substitution effect on the structural, thermal, and magnetic properties of the infinite layer iron oxide AFeO2 (A = alkali-earth elements) with an FeO4 square-planar coordination. Together with the previous study showing a total substitution by Ca, Ba substitution is found to be tolerable up to 30%, presenting almost the same substitutional range as that found in ACuO2 under high pressure. Notably, Ba substitution shows little influence on the magnetic properties, in contrast to expectations from first principles calculations. The temperature at which oxidation to an AFeO2.5 phase occurs and its transformation rate show a wide variation tunable solely by the out-of-plane distance.

Original languageEnglish
Pages (from-to)5957-5962
Number of pages6
JournalInorganic chemistry
Volume49
Issue number13
DOIs
Publication statusPublished - 2010 Jul 5

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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