Critical phenomena in perfect and inperfect TGS crystals
Critical phenomena in perfect and inperfect TGS crystals
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完美和不完美 TGS 晶体中的关键现象
DOI：
10.1080/00150198008207030
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发表时间：
1980
期刊：
影响因子：
0.8
通讯作者：
V. A. Fedorikhin
中科院分区：
文献类型：
--
作者：
B. Strukov;S. Taraskin;K. A. Minaeva;V. A. Fedorikhin
研究了高于(A型)和低于(B型)T_c的TGS晶体的热性能和弹性性质。A型晶体的比热和声速的临界反常与朗道理论密切相关，应被认为是“完美的”。B型晶体和小剂量γ辐照的A型晶体表现出非常相似的临界反常，其主要特征是顺电相中的“尾部”和铁电相中比热和声速的微小反常变化。理想晶体和非理想晶体的热反常和弹性反常均符合Picpard-Janovec关系。
Abstract The heat and elastic properties of TGS crystals grown above (type A) and below (type B) Tc were investigated. The critical anomalies of specific heat and sound velocity of type A crystals are closely follow Landau theory and should be considered as “perfect”. The type B crystals and small doses γ-irradiated type A crystals reveal the very similar critical anomalies which main features are the “tail” in paraelectric and small anomalous change of specific heat and sound velocity in ferroelectric phase. The thermal and elastic anomalies for both perfect and inperfect crystals obey Pippard-Janovec relations.