Thermodynamic aspects of magnetic-field-driven phase transformations in Gd-Si-Ge alloys

被引：13
|
作者：
Basso, V [1 ]
Lobue, M [1 ]
Sasso, CP [1 ]
Bertotti, G [1 ]
机构：
[1] Ist Elettrotecnico Nazl Galileo Ferraris, I-10135 Turin, Italy
来源：
JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 08期
关键词：
D O I：
10.1063/1.2163836
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A temperature-dependent Preisach model is proposed to describe hysteresis in materials in which a structural phase transformation driven by the magnetic field takes place. The model is applied to the interpretation of the temperature dependence of hysteretic magnetization curves measured for Gd-Si-Ge alloys. Predictions about the entropy exchanged during transformations under increasing or decreasing field reveal the role played by internal dissipative processes. (C) 2006 American Institute of Physics.
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页数：3
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