書誌事項
- タイトル別名
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- Synthesis and magnetic property of Cu2GeO4 containing edge-sharing CuO2 chains.
- ヘン キョウユウ 1ジゲン サ カゴウブツ Cu2GeO4 ノ ゴウセイ ト
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Polycrystals of Cu2GeO4 have been synthesized under high pressure (4 GPa) and high temperature (900°C) conditions. It has the tetragonally distorted spinel structure with CuO6 octahedra elongated along the c axis due to the Jahn-Teller effect. The crystal structure is apparently three-dimensional, but the major superexchange path is assumed to be one-dimensional along the edge sharing chains. In fact, the magnetic susceptibility of Cu2GeO4 shows a broad maximum around 100 K and is well described as that of the S=1/2 Heisenberg antiferromagnetic chains with interaction J of 135 K. A small jump in the susceptibility curve is observed at 33 K, which is considered to be a sign of antiferromagnetic ordering. Moreover, specific heat measurements show a large sharp peak at the same temperature, suggesting a first-order phase transition. The effects of Mg substitution for Cu and Si substitution for Ge are also reported.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 45 (12), 1136-1141, 1998
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681284926208
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- NII論文ID
- 10002053371
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- NII書誌ID
- AN00222724
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 4629448
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可