The Mean-Field Theory for the Study of the Magnetocaloric Effect of Nd0.67Ba0.33Mn0.98Fe0.02O3 Manganite

被引：5
|
作者：
Hsini, Mohamed [1 ]
Hcini, Sobhi [2 ]
Boudard, Michel [3 ]
Zemni, Sadok [1 ]
机构：
[1] Univ Monastir, Fac Sci Monastir, Dept Phys, Lab Phys Chem Mat, Monastir 5019, Tunisia
[2] Univ Kairouan, Fac Sci & Technol Sidi Bouzid, Res Unit Valorizat & Optimizat Exploitat Resource, Univ Campus Agr City, Sidi Bouzid 9100, Tunisia
[3] Univ Grenoble Aples, CNRS, LMGP, F-38000 Grenoble, France
来源：
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2018年 / 31卷 / 03期
关键词：
Mean-field theory; Bean-Rodbell model; Magnetization; Magnetocaloric effect; ROOM-TEMPERATURE;
D O I：
10.1007/s10948-017-4259-2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, we exploit the mean-field theory and the Bean-Rodbell model to justify the magnetocaloric effect (MCE) on Nd0.67Ba0.33Mn0.98Fe0.02O3 manganite. The modeling of magnetic properties was investigated. The Bean-Rodbell equation of state leads the system to second-order ferromagnetic (FM)-paramagnetic (PM) phase transition. The expressions describing the magnetic entropy change under the influence of magnetic field have been derived. A large magnetic entropy has been observed in our sample with a peak centered on the Curie temperature. The theoretical calculations are compared with experimental behavior.
引用
收藏
页码：841 / 848
页数：8
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