Magnetocaloric properties of La0.6Ca0.4MnO3

被引：34
|
作者：
Hamad, Mahmoud Aly [1 ]
机构：
[1] Al Jouf Univ, Coll Sci, Dept Phys, Skaka, Al Jouf, Saudi Arabia
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2013年 / 113卷 / 02期
关键词：
La0.6Ca0.4MnO3; Magnetocaloric effect; Model; Magnetic entropy change; Heat capacity change; MAGNETIC ENTROPY CHANGE; LA1-XCAXMNO3; TRANSITIONS;
D O I：
10.1007/s10973-012-2723-6
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A theoretic work on magnetocaloric properties of the polycrystalline La0.6Ca0.4MnO3 system near a second-order phase transition from a ferromagnetic to a paramagnetic state is presented. The value of the magnetocaloric effect has been determined from the calculation of magnetization as a function of temperature under different external magnetic field shifts. The magnetic entropy change a dagger S (M) reaches a peak of about 3 J kg(-1) K-1 at 266 K upon 1.60 KA/m applied field variation. The a dagger S (M) distribution is much more uniform than that of gadolinium, which is desirable for an Ericson-cycle magnetic refrigerator, which is beneficial for the household application of active magnetic refrigerant materials.
引用
收藏
页码：609 / 613
页数：5
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