Differential scanning calorimetry experiments in RCo2

被引：9
作者：
Herrero-Albillos, J
Casanova, F
Bartolomé, F
García, LM
Labarta, A
Batlle, X
机构：
[1] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
[2] Univ Barcelona, Dept Fis Fonamental, Barcelona 08028, Spain
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷
关键词：
magnetocaloric effect; rare-earth-transition metal compounds; anisotropy-magnetic; phase transitions;
D O I：
10.1016/j.jmmm.2004.11.336
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Differential scanning calorimetry experiments have been performed under magnetic field in RCo2 Laves phases compounds (R = Pr, Nd, Tb, Dy, Ho, and Er) in order to clarify the nature of their ordering transitions. A significant controversy is present in previous literature about the character of PrCo2 and NdCo2 ferromagnetic transitions. The calorimetric curves show without ambiguity that they are second-order transitions. For the compounds showing a first-order transition, enthalpy and entropy changes have been obtained. ErCo2 calorimetric curves show a fine peak structure that can be related with the anisotropy of the coexistence curve. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：682 / 685
页数：4
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