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.
引用
收藏
页数：7
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