Size-induced modification of magneto-transport properties in nanocrystalline Sm0.5Ca0.5MnO3 compound

被引：11

作者：

Banik, Sanjib ^{[1
]}

Das, Kalipada ^{[1
]}

Das, I. ^{[1
]}

机构：

[1] Saha Inst Nucl Phys, CMP Div, Kolkata 700064, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 403卷

关键词：

Manganites; Charge order; Activation energy; Magnetoresistance; PHASE-TRANSITION; CHARGE; PR1-XCAXMNO3;

D O I：

10.1016/j.jmmm.2015.11.072

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the electronic and magneto-transport behaviors of the nanocrystalline Sm0.5Ca0.5MnO3 compound and the results are compared with their bulk counterpart. Our experimental findings indicate that the insulating nature of Sm0.5Ca0.5MnO3 compound is found to reduce and the enhancement of magnetoresistance has been observed with the reduction of particle sizes. Resistivity of the nanocrystalline and bulk samples in different temperature regions are analyzed by considering the adiabatic small polaron hopping model. Our analysis of resistivity data suggests that the activation energy markedly reduces and magnetoresistance increases in nanoscale regime due to the pronounced surface effect. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：36 / 40

页数：5

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