Ferromagnetic Cuprates, CaCu3Ge4O12 and CaCu3Sn4O12, with A-site Ordered Perovskite Structures
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- Shiraki Hiroshi
- Institute for Chemical Research, Kyoto University
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- Saito Takashi
- Institute for Chemical Research, Kyoto University
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- Yamada Takahiro
- Institute for Chemical Research, Kyoto University
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- Tsujimoto Masahiko
- Institute for Chemical Research, Kyoto University
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- Azuma Masaki
- Institute for Chemical Research, Kyoto University
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- Kurata Hiroki
- Institute for Chemical Research, Kyoto University
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- Isoda Seiji
- Institute for Chemical Research, Kyoto University
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- Takano Mikio
- Institute for Chemical Research, Kyoto University
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- Shimakawa Yuichi
- Institute for Chemical Research, Kyoto University
Bibliographic Information
- Other Title
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- 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
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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
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 55 (2), 132-136, 2008
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390001206309503232
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- NII Article ID
- 10021172743
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- NII Book ID
- AN00222724
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- COI
- 1:CAS:528:DC%2BD1cXis1Gjt7k%3D
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 9390155
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed