Magnetic and magnetocaloric properties of Pr1-xSrxCoO3 cobaltites

被引：22

作者：

Deac, I. G. ^{[1
]}

Vladescu, A. ^{[1
,2
]}

机构：

[1] Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania

[2] Emerson Proc Management Roxar Div, Cluj Napoca, Romania

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2014年 / 365卷

关键词：

Cobaltites; Ferromagnetism; Magnetic transition; Magnetocaloric effect; SPIN-STATE; TRANSITION; LACOO3; OXIDES;

D O I：

10.1016/j.jmmm.2014.04.040

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report results of magnetic measurements and magnetocaloric investigations on the series of polycrystalline compounds Pr1-xSrxCoO3 (x=0.3, 0.4, 0.5 and 0.6). Magnetic entropy change Delta S-M was estimated from isothermal magnetization data. We have found quite large values of magnetic entropy change around T-C's, for the sample with x=0.5, around 1.9 J/kg K for (mu 0)Delta H=4T, with reasonable large relative cooling power (similar to 104 J/kg). The modified Allot plot (MAP) method was used to analyze the paramagnetic-ferromagnetic phase transition to hod the critical exponents. The values of the critical exponents associated with this transition were close to those expected in mean-field model. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1 / 7

页数：7

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