Phenomenological modeling of magnetic and magnetocaloric properties in rare earth doped La0.8Ca0.2MnO3

被引：8

作者：

Khlifi, M. ^{[1
]}

Dhahri, Kh ^{[2
]}

Dhahri, J. ^{[1
]}

Dhahri, E. ^{[3
]}

Hlil, E. K. ^{[4
]}

机构：

[1] Univ Monastir, Fac Sci Monastir, Lab Matiere Condensee & Nanosci LR11ES40, Monastir, Tunisia

[2] Taibah Univ, Coll Sci Yanbu, Phys Dept, Medina, Saudi Arabia

[3] Univ Sfax, Fac Sci Sfax, Lab Phys Appl, Sfax, Tunisia

[4] Univ J Fourier, CNRS, Inst Neel, Grenoble, France

来源：

PHASE TRANSITIONS | 2019年 / 92卷 / 04期

关键词：

Manganite; perovskite; magnetocaloric effect; phenomenological model; ENTROPY CHANGE; MANGANITES; TRANSITION; MAGNETORESISTANCE; RESISTIVITY; BEHAVIOR;

D O I：

10.1080/01411594.2019.1592172

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

La0.8Ca0.2MnO3 manganese oxides have been prepared by the conventional solid-state reaction. The samples crystallize in the orthorhombic structure with Pnma space group. A first-order magnetic phase transition from ferromagnetic to paramagnetic state is observed at the Curie temperature that is found to be around 241 K. The magnetic and magnetocaloric properties have been simulated using a phenomenological model. The maximum of magnetic entropy change is of order 8.2 J/ kg K for an applied magnetic field of 5 T, and the adiabatic temperature change is found to be of 4 K under a same magnetic field; this high value gives the sample the possibility of technologic application in the magnetic refrigeration area. The simulated results of magnetization and magnetic entropy change are compared with the experimental measurements. Finely, we found a good agreement between experimental and theoretical results.

引用

页码：411 / 418

页数：8

共 35 条

[1] A mean-field scaling method for first- and second-order phase transition ferromagnets and its application in magnetocaloric studies [J].

Amaral, J. S. ;

Silva, N. J. O. ;

Amaral, V. S. .

APPLIED PHYSICS LETTERS, 2007, 91 (17)

[2] The persistence of the magnetocaloric effect in (La1-xAx)0.67Ba0.33Mn1.05O3-δ [J].

Ancona-Torres, C. ;

Pryds, N. ;

Kuhn, L. Theil ;

Bahl, C. R. H. ;

Linderoth, S. .

JOURNAL OF APPLIED PHYSICS, 2010, 108 (07)

[3]

Ashcroft N. W., 1976, SOLID STATE PHYS

[4] Developments in magnetocaloric refrigeration [J].

Brück, E .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2005, 38 (23) :R381-R391

[5] Phenomenological Modeling of Magnetocaloric Effect for Ni58Fe26Ga28 Alloy [J].

El-Sayed, Adly H. ;

Hamad, Mahmoud A. .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2018, 31 (06) :1895-1898

[6] Electronic structure of CMR manganites (invited) [J].

Goodenough, JB .

JOURNAL OF APPLIED PHYSICS, 1997, 81 (08) :5330-5335

[7] Magnetocaloric effect in La0.65-xEuxSr0.35MnO3 [J].

Hamad, Mahmoud A. .

PHASE TRANSITIONS, 2014, 87 (05) :460-467

[8] Calculations on Nanocrystalline CoFe2O4 Prepared by Polymeric Precursor Method [J].

Hamad, Mahmoud Aly .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2013, 26 (03) :669-673

[9] Magnetocaloric properties and Landau theory of Dy0.5(Sr1-xcax)0.5MnO3 (0 ≤ x ≤ 0.3) manganites at cryogenic temperatures [J].

Hamdi, R. ;

Tozri, A. ;

Dhahri, E. ;

Bessais, L. .

CHEMICAL PHYSICS LETTERS, 2017, 680 :94-100

[10] Influence of negative lattice expansion and metamagnetic transition on magnetic entropy change in the compound LaFe11.4Si1.6 [J].

Hu, FX ;

Shen, BG ;

Sun, JR ;

Cheng, ZH ;

Rao, GH ;

Zhang, XX .

APPLIED PHYSICS LETTERS, 2001, 78 (23) :3675-3677

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