Theoretical work on magnetocaloric effect in ceramic and sol-gel La0.67Ca0.33MnO3

被引：42

作者：

Hamad, Mahmoud Aly ^{[1
]}

机构：

[1] Al Jouf Univ, Coll Sci, Dept Phys, Al Jouf, Skaka, Saudi Arabia

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2013年 / 111卷 / 02期

关键词：

Magnetocaloric effect; Model; Magnetization; Magnetic entropy change; Heat capacity change; Relative cooling power; GIANT MAGNETORESISTANCE;

D O I：

10.1007/s10973-012-2505-1

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this study, a theoretical work on magnetocaloric properties of ceramic and sol-gel La0.67Ca0.33MnO3 samples was presented. The value of the magnetocaloric effect has been determined from theoretical work on magnetization as a function of temperature. It is showed that ceramic sample shows better magnetocaloric properties than the sol-gel one. Though the maximum magnetic entropy change a dagger S (M) of ceramic sample upon 5 kOe applied field variation which is about 76 % of that of a pure Gd metal upon 5 kOe, a dagger S (M) distribution of the La0.67Ca0.33MnO3 is much more uniform than that of Gd. This feature is desirable for an Ericson-cycle magnetic refrigerator.

引用

页码：1251 / 1254

页数：4

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