Heat capacity anomaly due to the α-to-β structural phase transition in ZrW2O8

被引：76

作者：

Yamamura, Y ^{[1
]}

Nakajima, N ^{[1
]}

Tsuji, T ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Ctr New Mat, Hokuri Ku, Tatsunokuchi, Ishikawa 9231292, Japan

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 114卷 / 09期

关键词：

heat capacity; phase transitions; order-disorder effects;

D O I：

10.1016/S0038-1098(00)00092-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Heat capacity of ZrW2O8 has been measured as a function of temperature from 340 to 550 K. An anomaly in heat capacity corresponding to the ol-to-P structural phase transition was clearly detected for the first time around 431 K. The transition temperature was determined to be 431 +/- 1 K, and the minimum bound of the transition entropy as 2.1 J K-1 mol(-1). Although this value is smaller than the theoretical one of R In 2 (= 5.8 J K-1 mol(-1)), the phase transition is considered to be of the order-disorder type. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：453 / 455

页数：3

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