Unconventional critical behavior near the phase transition temperature and magnetocaloric effect in La0.5Ca0.4Ag0.1MnO3 compound

被引：14

作者：

Assoudi, N. ^{[1
]}

Smari, M. ^{[1
,2
]}

Walha, I. ^{[1
]}

Dhahri, E. ^{[1
]}

Shevyrtalov, S. ^{[2
]}

Dikaya, O. ^{[4
]}

Rodionova, V. ^{[2
,3
]}

机构：

[1] Univ Sfax, Sfax Fac Sci, Appl Phys Lab, BP 802, Sfax 3018, Tunisia

[2] Immanuel Kant Balt Fed Univ, Ctr Functionalized Magnet Mat FunMagMa, Kaliningrad 236041, Russia

[3] Natl Univ Sci & Technol MISiS, Moscow 119049, Russia

[4] Immanuel Kant Balt Fed Univ, REC Funct Nanomat, Kaliningrad 236001, Russia

来源：

CHEMICAL PHYSICS LETTERS | 2018年 / 706卷

关键词：

Magnetic properties; Unconventional critical behavior; Magnetocaloric effect; Relative cooling power; MAGNETIC ENTROPY CHANGE; LA0.5CA0.5-XAGXMNO3; COMPOUNDS; ELECTRIC PROPERTIES; MANGANESE; RE;

D O I：

10.1016/j.cplett.2018.06.008

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：

The critical behavior associated with the magnetic phase transition has been investigated by magnetization isotherms in La0.5Ca0.4 Ag0.1MnO3 (LCAMO) powder. The X-ray diffraction characterization has revealed that this sample crystallized in the orthorhombic symmetry with Pnma space group. While the experimental results revealed that this sample underwent a paramagnetic-ferromagnetic transition, the magnetic measurements data indicated that the compound exhibited a second-order phase transition. Furthermore, the critical exponents values were found as beta = 0.79, gamma = 0.71 and delta = 1.828 with T-C = 189.87 K. The relative cooling power of the sample was determined as 14.70 J/kg under a magnetic field of 1 T making it a potential working material in magnetic refrigeration. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：182 / 188

页数：7

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