Influence of Gd-doping in La0.7Ca0.3MnO3 on its structural and magneto-electrical properties

被引：29

作者：

Altintas, S. P. ^{[1
]}

Amira, A. ^{[2
]}

Varilci, A. ^{[1
]}

Terzioglu, C. ^{[1
]}

机构：

[1] Abant Izzet Baysal Univ, Dept Phys, Fac Arts & Sci, TR-14280 Bolu, Turkey

[2] Univ Jijel, LEND, Jijel 18000, Algeria

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2012年 / 324卷 / 07期

关键词：

Colossal magnetoresistance (CMR); Rare earth doping; Metal-insulator transition; Manganites; INSULATOR-METAL TRANSITION; COLOSSAL-MAGNETORESISTANCE; MAGNETIC-PROPERTIES; DOPED MANGANITES; CMR MANGANITES; THIN-FILMS; RESISTIVITY; TRANSPORT; LA1-XSRXMNO3; TEMPERATURE;

D O I：

10.1016/j.jmmm.2011.11.034

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bulk samples of gadolinium doped manganites with compositional formula La0.7-xGdxCa0.3MnO3 (x=0.0 and 0.1) were prepared by conventional solid state reaction method. After characterizing the samples by X-ray diffraction, scanning electron microscope and energy dispersive X-ray spectrometer, a systematic investigation of electrical and magneto-transport properties has been investigated. The replacement of La ion by Gd results in a decrease of the metal-insulator transition temperature T-MI and the magnetoresistance as well as the resistivity are found to increase. The electrical resistivity in the entire temperature range fit well with the phenomenological percolation model, which is based upon an approach that the system consists of the phase separated ferromagnetic metallic and paramagnetic insulating regions. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1331 / 1336

页数：6

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