Investigation of the magnetocaloric effect by means of theoretical models in Nd0.67Ba0.33MnO3 manganite

被引：4

作者：

Alzahrani, Bandar ^{[1
]}

Hsini, Mohamed ^{[2
]}

Hcini, Sobhi ^{[3
]}

Dhahri, Abdessalem ^{[2
]}

Bouazizi, Mohamed Lamjed ^{[1
]}

机构：

[1] Prince Sattam Bin Abdulaziz Univ, Coll Engn, Al Kharj, Saudi Arabia

[2] Univ Monastir, Fac Sci Monastir, Dept Phys, Lab Phys Chem Mat, Monastir 5019, Tunisia

[3] Univ Kairouan, Fac Sci & Technol Sidi Bouzid, Res Unit Valorizat & Optimizat Exploitat Resource, Sidi Bouzid 9100, Tunisia

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2020年 / 126卷 / 05期

关键词：

Magnetocaloric effect; Magnetization; Landau theory; Phenomenological model; MAGNETIC ENTROPY CHANGE; TRANSITION; BEHAVIOR; LA;

D O I：

10.1007/s00339-020-03527-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, we have used the Landau theory to simulate the MCE in the Nd0.67Ba0.33MnO3 manganite. The expanding of the Gibb's free energy as a function of magnetization to the eighth order has given better results than the developing at sixth order in modeling the magnetic entropy change. The second-order phase magnetic transition of Nd0.67Ba0.33MnO3 sample has been proved. Under low magnetic fields, a phenomenological model has been used to determine some magnetic properties for the sample. Theoretical calculations have been compared to the experimental results.

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页数：7

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