Material Design and High-Pressure Synthesis of Novel <i>A</i>-Site-Ordered Perovskites <i>A</i>Mn3Al4O12 (<i>A</i> = Y, Yb, and Dy) with Square-Planar-Coordinated Mn3+

• Takashi Saito

  Institute for Chemical Research, Kyoto University

• Takenori Tohyama

  Institute for Chemical Research, Kyoto University

• Patrick M Woodward

  Department of Chemistry, Ohio State University

• Yuichi Shimakawa

  Institute for Chemical Research, Kyoto University

抄録

Structural stability of A-site-ordered perovskites AMn3Al4O12 was evaluated by the global instability index calculated from the SPuDS program. Based on the results, we “designed” new compounds AMn3Al4O12 (A = Y, Yb, and Dy), and these compounds were synthesized with a high-pressure technique. The obtained compounds were ionic crystals, A3+Mn3+3Al3+4O2−12, with fourfold square-planar coordination for Mn3+ at the originally twelvefold-coordinated A site of the ABO3 simple perovskite structure. Structural parameters obtained from the structure refinement well agreed with the “predicted” values. The synthesized compounds contained magnetic Mn3+ ions with S = 2 spins at the A′ site, and the A′–A′ interaction resulted in antiferromagnetic ordering of the Mn3+ spins at temperatures ranging from 29 to 40 K. The Yb3+/Dy3+ moments in (Yb/Dy)Mn3Al4O12 were found to be paramagnetic even below the antiferromagnetic transition temperatures.

収録刊行物

• Bulletin of the Chemical Society of Japan

  Bulletin of the Chemical Society of Japan 84 (7), 802-806, 2011-07

  Oxford University Press (OUP)

キーワード

• General Chemistry

詳細情報

• CRID: 1360565169050228480
• NII論文ID: 130004152941
• DOI: 10.1246/bcsj.20100335
• ISSN: 13480634
• ISSN: 00092673
• Web Site: https://academic.oup.com/bcsj/article-pdf/84/7/802/56272707/bcsj.20100335.pdf
• データソース種別:
  • Crossref
  • CiNii Articles
  • KAKEN