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

页码：841 / 848

页数：8

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