Prediction of thermomagnetic properties of La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3

被引：133
|
作者：
Hamad, Mahmoud Aly [1 ]
机构：
[1] Al Jouf Univ, Coll Sci, Dept Phys, Al Jouf, Saudi Arabia
来源：
PHASE TRANSITIONS | 2012年 / 85卷 / 1-2期
关键词：
magnetocaloric effect; model; magnetization; magnetic entropy change; relative cooling power; specific heat;
D O I：
10.1080/01411594.2011.605027
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
The dependence of magnetization on the variation of temperature for La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3 perovskite-type ceramic materials under an external magnetic field was modelled. Application of phenomenological model was performed, showing a good agreement with the experimental data. Temperature dependence of change of both magnetic entropy and specific heat under magnetic field 0.05T was predicted for La0.67Ca0.33MnO3 and La0.67Sr0.33MnO3. Predicted values of maximum magnetic entropy change, full-width at half-maximum, relative cooling power and maximum specific heat under 0.05 T were evaluated.
引用
收藏
页码：106 / 112
页数：7
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