Order-disorder phase transition in bismuth-based high-temperature superconductors

被引：3
|
作者：
Tornau, EE
Lapinskas, S
Rosengren, A
机构：
[1] Lithuania Acad Sci, Inst Semicond Phys, LT-2600 Vilnius, Lithuania
[2] Vilnius State Univ, Fac Phys, LT-2054 Vilnius, Lithuania
[3] Royal Inst Technol, S-10044 Stockholm, Sweden
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1997年 / 291卷 / 3-4期
关键词：
order-disorder phase transition; ice rule; bismuth superconductors;
D O I：
10.1016/S0921-4534(97)01648-1
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A model for a structural phase transition, determined by an ice-rule-type of Bi-O bonding in the BiO plane, is proposed. A first-order transition is obtained at higher temperatures. The entropy, specific heat, discontinuity of the order parameter and phase diagram, useful for the description of substitutions of Bi by other atoms, are calculated. We suggest an explanation for the modulation unrelated to extra (non-stoichiometric) oxygen within the BiO plane. (C) 1997 Elsevier Science B.V.
引用
收藏
页码：173 / 180
页数：8
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