Structural, electrical, magnetic and thermal properties of Gd1-xSrx MnO3 (0.2 ≤ x ≤ 0.5) manganites

被引：38
|
作者：
Nagaraja, B. S. [1 ]
Rao, Ashok [1 ]
Babu, P. D. [2 ]
Okram, G. S. [3 ]
机构：
[1] Manipal Univ, Manipal Inst Technol, Dept Phys, Manipal 576104, India
[2] Bhabha Atom Res Ctr, UGC DAE Consortium Sci Ressearch, Mumbai 400085, Maharashtra, India
[3] UGC DAE Consortium Sci Res, Indore 452017, India
来源：
PHYSICA B-CONDENSED MATTER | 2015年 / 479卷
关键词：
Manganites; Solid state reaction; Rietveld refinement; Magnetization; Thermoelectric power; COLOSSAL MAGNETORESISTANCE; SR; GD; TEMPERATURE; CONDUCTION; REVERSAL; BEHAVIOR; SPIN; DY;
D O I：
10.1016/j.physb.2015.09.025
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A systematic study on structural, electrical, magnetic and thermoelectric properties of bulk samples of Gd1-xSrxMnO3, synthesized by solid state reaction, is carried out in this communication. All the samples are in single phase with no detectable impurities. All the samples exhibit insulating behavior and the results indicate that high temperature electrical resistivity can be explained using small polaron hopping (SPH) model, whereas variable hopping model (VRH) model is valid in the low temperature regime. The magnetization results show that large irreversible magnetization is observed at low temperatures. The thermoelectric power measurement demonstrates that these samples exhibit colossal thermoelectric power. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：10 / 20
页数：11
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