Critical Behaviour of Specific Heat in Ferroelectric K2ZnCl4 and (NH4)2BeF4 at Normal-Incommensurate Phase Transition
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- Haga Hisashi
- Department of Physics, Faculty of Science, Hokkaido University
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- Onodera Akira
- Department of Physics, Faculty of Science, Hokkaido University
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- Tokunaga Masaharu
- Department of Physics, Faculty of Science, Hokkaido University
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- Shiozaki Yôichi
- Department of Physics, Faculty of Science, Hokkaido University
書誌事項
- タイトル別名
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- Critical Behaviour of Specific Heat in Ferroelectric K<SUB>2</SUB>ZnCl<SUB>4</SUB> and (NH<SUB>4</SUB>)<SUB>2</SUB>BeF<SUB>4</SUB> at Normal-Incommensurate Phase Transition
- Critical Behaviour of Specific Heat in
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Measurements of specific heat were carried out on structurally incommensurate ferroelectrics K2ZnCl4 and (NH4)2BeF4 over a wide temperature region with an AC calorimetric technique. Critical indices α associated with the normal-incommensurate phase transition are obtained as 0.12±0.02 for K2ZnCl4 and 0.18±0.02 for (NH4)2BeF4. These values do not agree with that in the 3d XY-model proposed by Bruce and Cowley, and are rather comparable with α=0.125 for the 3d Ising-model. A crossover from a logarithmic behaviour to a power-law behaviour was found at reduced temperatures tcr=1×10−3 for K2ZnCl4 and 5×10−3 for (NH4)2BeF4, respectively.
収録刊行物
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- Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ
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Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｐｈｙｓｉｃａｌ Ｓｏｃｉｅｔｙ ｏｆ Ｊａｐａｎ 62 (5), 1597-1602, 1993
一般社団法人 日本物理学会
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詳細情報 詳細情報について
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- CRID
- 1390282679153733632
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- NII論文ID
- 110001955943
- 130003901990
- 210000097353
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- NII書誌ID
- AA00704814
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- BIBCODE
- 1993JPSJ...62.1597H
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- COI
- 1:CAS:528:DyaK3sXkvVert7Y%3D
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- ISSN
- 13474073
- 00319015
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- NDL書誌ID
- 3819989
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 使用不可