Magnetotransport properties and magnetocaloric effect in La0.67Ca0.33Mn1-xTMxO3 (TM=Cu, Zn) perovskite manganites

被引：14
作者：
Quoc Thanh Phung [1 ]
Van Khai Vu [2 ]
An Bang Ngac [2 ]
Huy Sinh Nguyen [2 ]
Nam Nhat Hoang [1 ]
机构：
[1] Vietnam Natl Univ, Fac Tech Phys & Nanotechnol, Univ Engn & Technol, Cau Giay, Ha Noi, Vietnam
[2] Vietnam Natl Univ, Fac Phys, Ha Noi Univ Sci, Thanh Xuan, Ha Noi, Vietnam
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 15期
关键词：
Perovksite; Manganate; Magnetotransport; Magnetocaloric effect; MAGNETIC ENTROPY CHANGE; MAGNETORESISTANCE PROPERTIES; TRANSPORT-PROPERTIES; LA0.7CA0.3MNO3; SUBSTITUTION;
D O I：
10.1016/j.jmmm.2012.03.001
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetic and transport properties of the perovskites La0.67Ca0.33Mn1-xTMxO3 were found to be sufficiently changed with the substitution of Mn-sites by other 3d transition-metal cations (TM = Cu,Zn; x=0.15). The values of T-C, TM-1. and T-CMR were surveyed when Mn was replaced by Cu and Zn. The magnetic field induced resistivity and magnetic entropy change of these samples showed abrupt changes near T-C (194.2 and 201.5 K for Cu and Zn-doped case respectively) and attained the highest values among the doped cases (up to 20% Cu). The maximum values (obtained at H=4 kOe) of magnetoresistance ratio (CMR) were 27.8%, and 24.5% and of magnetic entropy change (-Delta S-M) were 3.9 and 3.2 J/kg K for Cu and Zn-doped, respectively. (C) 2012 Elsevier B.V. All rights reserved.
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页码：2363 / 2367
页数：5
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