Structural Analysis, Magnetocaloric Effect, and Critical Exponents for La0.6Sr0.2Na0.2MnO3 Manganite

被引：6

作者：

Hcini, Sobhi ^{[1
]}

Charguia, Raihane ^{[2
,3
]}

Dhahri, Abdessalem ^{[4
]}

Bouazizi, Mohamed Lamjed ^{[5
]}

机构：

[1] Kairouan Univ, Res Unit Valorizat & Optimizat Exploitat Resource, Fac Sci & Technol Sidi Bouzid, Univ Campus Agr City, Sidi Bouzid 9100, Tunisia

[2] Qassim Univ, Dept Phys, Coll Sci & Arts, Buraydah, Saudi Arabia

[3] Univ Tunis El Manar, Dept Phys, Fac Sci, Phys Lab Condensed Matters, Tunis, Tunisia

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

[5] Prince Sattam Bin Abdulaziz Univ, Mech Dept, Coll Engn, Al Kharj, Saudi Arabia

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2019年 / 32卷 / 08期

关键词：

Manganite0073; Structural analysis; Magnetocaloric effect; Critical exponents; MAGNETIC ENTROPY CHANGE; SOL-GEL; STATE; NICKEL;

D O I：

10.1007/s10948-018-4988-x

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This work focuses on the structural, magnetocaloric effect, and critical exponent investigations of La0.6Sr0.2Na0.2MnO3 manganite prepared via sol-gel method. XRD analysis confirms the rhombohedral structure with R3c symmetry for this sample, and Rietveld method was used to estimate its different structural parameters. The sample presents FM-PM phase transition of second-order type at T-C=309K. The maximum of magnetic entropy change (-SMmax) and relative cooling power (RCP) reach values of about 3.57Jkg(-1)K(-1) and 214.46Jkg(-1), respectively (at mu H-0=5T). These values indicate that La0.6Sr0.2Na0.2MnO3 sample can be used as active magnetic refrigerator. Critical exponents (beta, gamma, and delta) of the sample have studied by analyzing the M(mu H-0, T) isotherms using different techniques. The estimated values of these critical exponents are found to be different to those predicted for standard theoretical models.

引用

页码：2571 / 2578

页数：8

共 32 条

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