Low Temperature Magnetic Properties of Pr0.7(Ca,Sr)0.3CoO3 Oxides

被引：4

作者：

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

Vladescu, A. ^{[1
]}

Balasz, I. ^{[1
]}

Tunyagi, A. ^{[1
]}

Tetean, R. ^{[1
]}

机构：

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

来源：

ACTA PHYSICA POLONICA A | 2011年 / 120卷 / 02期

关键词：

PR1-XCAXCOO3; COBALTITES; TRANSITION; MANGANITES; TRANSPORT; BEHAVIOR; CA;

D O I：

10.12693/APhysPolA.120.306

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated magnetic and magnetocaloric properties of Pr-0.7(Ca1-xSrx)(0.3)CoO3, when the average size of the interpolated cation was changed. Pr0.7Ca0.3CoO3 has an orthorhombic Pnma symmetry and it shows a magnetic cluster-glass behavior below 70 K. When Sr partially replaces. Ca in this compound, its magnetic properties are improved, and it begins to have ferromagnetic-like behavior. The magnetic transition temperature, gradually, increases with increasing Sr content, up to 170 K, for x = 1. The electrical conduction also improved when Sr content increased. All the samples show negative magnetoresitance. Magnetic entropy change Delta S-M was estimated from isothermal magnetization data. We have found that it had higher values for the samples with x > 0.5, around 1 J/kg K for Delta B = 4 T, with reasonable good relative cooling power.

引用

页码：306 / 310

页数：5

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