Chemical tuning of structure, magnetization, and conductivity in the self-doped double-perovskite (Sr2-xCax)FeMoO6 (0 ≤ x ≤ 2.0) System

T. S. Chan, R. S. Liu*, G. Y. Guo, Shu-Fen Hu, J. G. Lin, J. M. Chen, J. P. Attfield

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

18 引文 斯高帕斯(Scopus)

摘要

The variations of crystal structure, magnetization, and conductivity resulting from the chemical pressure effects of substituting Sr2+ by the smaller Ca2+ in the double-perovskite (Sr2-xCax)FeMoO6 have been investigated. An increase in the Ca content leads to an increase in the Fe/Mo ordering in the materials, which raises the magnetic moments close to the theoretical value of 4, μB. An increase in conductivity with increasing Ca content is also found and is consistent with an increase in (Fe2+ + Mo6+)/(Fe3+ + Mo5+) band overlap rather than bandwidth changes. The changes observed by physical measurements are supported by the X-ray absorption near-edge structures of Fe and Mo and by band structure calculations.

原文英語
頁(從 - 到)425-432
頁數8
期刊Chemistry of Materials
15
發行號2
DOIs
出版狀態已發佈 - 2003 一月 1

ASJC Scopus subject areas

  • 化學 (全部)
  • 化學工程 (全部)
  • 材料化學

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