Ferromagnetic Cuprates, CaCu3Ge4O12 and CaCu3Sn4O12, with A-site Ordered Perovskite Structures

• Shiraki Hiroshi

  Institute for Chemical Research, Kyoto University

• Saito Takashi

  Institute for Chemical Research, Kyoto University

• Yamada Takahiro

  Institute for Chemical Research, Kyoto University

• Tsujimoto Masahiko

  Institute for Chemical Research, Kyoto University

• Azuma Masaki

  Institute for Chemical Research, Kyoto University

• Kurata Hiroki

  Institute for Chemical Research, Kyoto University

• Isoda Seiji

  Institute for Chemical Research, Kyoto University

• Takano Mikio

  Institute for Chemical Research, Kyoto University

• Shimakawa Yuichi

  Institute for Chemical Research, Kyoto University

Bibliographic Information

Other Title

• Ａサイトオーダーペロブスカイト型構造を持つ強磁性銅酸化物ＣａＣｕ３Ｇｅ４Ｏ１２及びＣａＣｕ３Ｓｎ４Ｏ１２
• Aサイト オーダー ペロブスカイトガタ コウゾウ オ モツ キョウジセイ ドウ サンカブツ CaCu3Ge4O12 オヨビ CaCu3Sn4O12

Abstract

We succeeded in synthesizing A-site ordered perovskites, CaCu₃Ge₄O₁₂ and CaCu₃Sn₄O₁₂, under high pressure and high temperature conditions. The magnetic measurements revealed that these compounds are ferromagnets in contrast to the isostructural antiferromagnet, CaCu₃Ti₄O₁₂. The ferromagnetism in CaCu₃Ge₄O₁₂ and CaCu₃Sn₄O₁₂ comes from the special alignment of CuO₄ planes in the perovskite structure. On the other hand, the involvement of Ti-3d orbitals in magnetic interactions give rise to the antiferromagnetic superexchange interaction and it overcomes the ferromagnetic direct interaction in CaCu₃Ti₄O₁₂. The finding demonstrates that either ferromagnetic or antiferromagnetic behavior can appear within the same structural framework.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 55 (2), 132-136, 2008

  Japan Society of Powder and Powder Metallurgy

Keywords

• CaCu<SUB>3</SUB>Ge<SUB>4</SUB>O<SUB>12</SUB>
• CaCu<SUB>3</SUB>Sn<SUB>4</SUB>O<SUB>12</SUB>
• high pressure synthesis
• ferromagnetic cuprate
• magnetic interaction

Details

• CRID: 1390001206309503232
• NII Article ID: 10021172743
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.55.132
• COI: 1:CAS:528:DC%2BD1cXis1Gjt7k%3D
• ISSN: 18809014
• ISSN: 05328799
• NDL BIB ID: 9390155
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9390155
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed