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

被引：34

作者：

Hamdi, R. ^{[1
]}

Tozri, A. ^{[1
]}

Dhahri, E. ^{[1
]}

Bessais, L. ^{[2
]}

机构：

[1] Univ Sfax, Lab Phys Appliquee, BP 1171, Sfax 3000, Tunisia

[2] UMR 7182 CNRS UPEC, CMTR, ICMPE, 2 Rue Henri Dunant, F-94320 Thiais, France

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 680卷

关键词：

Perovskite manganites; Relative cooling power; Magnetocaloric effect; Landau theory; PHASE-TRANSITION; LA0.5CA0.5-XAGXMNO3; COMPOUNDS; DY; BEHAVIOR; HO;

D O I：

10.1016/j.cplett.2017.05.041

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Magnetic entropy change of Dy-0.5(Sr1-xCax.)(0.5)MnO3 nanoparticles (0 <= x <= 0.3) was analyzed at low temperatures to investigate the magnetic refrigeration as a promising tool for hydrogen liquefaction. These samples depict interesting values of maximum magnetic entropy change and large relative cooling power, especially for x = 0.3 sample (about 169 J/Kg). It could be a promising candidate for magnetic refrigeration at cryogenic temperatures. Landau theory presents a discord between the experimental magnetic entropy change and the theoretical one. This disagreement is tending to be in accordance as Ca substitution is increasing and also with augmenting the applied magnetic field. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：94 / 100

页数：7

共 30 条

[1] Size reduction effect on the critical behavior near the paramagnetic to ferromagnetic phase transition temperature in La0.9Sr0.1MnO3 nanoparticles [J].

Baaziz, H. ;

Tozri, A. ;

Dhahri, E. ;

Hlil, E. K. .

SOLID STATE COMMUNICATIONS, 2015, 208 :45-52

[2] On the magnetocaloric effect in the multiferroic hexagonal DyMnO3 single crystals [J].

Balli, M. ;

Jandl, S. ;

Fournier, P. ;

Mansouri, S. ;

Mukhin, A. ;

Ivanov, Yu. V. ;

Salbashov, A. M. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2015, 374 :252-257

[3]

Banerjee B.K., 1964, Phys. Lett., P12

[4] ANTIFERROMAGNETISCHE UMWANDLUNG VON DY203 ER203 UND YB2O3 IM TEMPERATURBEREICH VON 1,1 BIS 4,2 DEGREES K [J].

BONRATH, H ;

HELLWEGE, KH ;

NICOLAY, K ;

WEBER, G .

PHYSIK DER KONDENSITERTEN MATERIE, 1966, 4 (05) :382-+

[5] Calibration of ac and dc magnetometers with a Dy2O3 standard [J].

Chen, D. -X. ;

Skumryev, V. ;

Bozzo, B. .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2011, 82 (04)

[6] Large magnetocaloric effect in Ln0.5Ca0.5MnO3 (Ln=Gd, DY) compounds: Conseqence of magnetic precursor effect of rare earth ions [J].

Das, Kalipada ;

Paramanik, Tapas ;

Das, I. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2015, 374 :707-710

[7] Effect of Sn-doping on the structural, magnetic and magnetocaloric properties of La0.67Ba0.33Mn1-xSnxO3 compounds [J].

Dhahri, J. ;

Dhahri, A. ;

Oumezzine, M. ;

Dhahri, E. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2008, 320 (21) :2613-2617

[8] Irreversible metamagnetic transition and magnetic memory in small-bandwidth manganite Pr1-xCaxMnO3 (x=0.0-0.5) [J].

Elovaara, T. ;

Huhtinen, H. ;

Majumdar, S. ;

Paturi, P. .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2012, 24 (21)

[9] Magnetocaloric effect of the ternary Dy, Ho and Er platinum gallides [J].

Franca, E. L. T. ;

dos Santos, A. O. ;

Coelho, A. A. ;

da Silva, L. M. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2016, 401 :1088-1092

[10] Scaling Laws for the Magnetocaloric Effect in Calcium Deficiency Manganites La0.8Ca0.2-x a- x MnO3 with a Second-Order Magnetic Phase Transition [J].

Khlifi, M. ;

Dhahri, E. ;

Hlil, E. K. .

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2014, 27 (05) :1341-1345

← 1 2 3 →