Entropy change for magnetic phase transitions in CoNi/Gd nanolayers

被引：4
|
作者：
Hossu, M. R. [1 ]
Hao, Y. [2 ]
Koymen, A. R. [1 ]
机构：
[1] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA
[2] Univ Texas Arlington, Dept Mat Sci & Engn, Arlington, TX 76019 USA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 21期
关键词：
D O I：
10.1088/0953-8984/20/21/215224
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
First-order magnetic phase transitions showing thermal hysteresis have been investigated in CoNi/Gd nanolayers. The phase transitions between two coexisting ordered phases are controlled by external magnetic fields (50-500 Oe). The magnetic entropy change has been calculated from isothermal hysteresis data showing two discontinuities with opposite signs as the temperature is cycled in the 20-300 K temperature interval.
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页数：5
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