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
收藏
页码：36 / 40
页数：5
相关论文
共 27 条
[1]   THE MEASUREMENT OF GROWTH AND DEFORMATION FAULTING IN HEXAGONAL COBALT [J].
ANANTHARAMAN, TR ;
CHRISTIAN, JW .
ACTA CRYSTALLOGRAPHICA, 1956, 9 (05) :479-486
[2]   Conversion of a glassy antiferromagnetic-insulating phase to an equilibrium ferromagnetic-metallic phase by devitrification and recrystallization in Al substituted Pr0.5Ca0.5MnO3 [J].
Banerjee, A. ;
Kumar, Kranti ;
Chaddah, P. .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2009, 21 (02)
[3]   Experimental observation of charge ordering in nanocrystalline Pr0.65Ca0.35MnO3 [J].
Biswas, Anis ;
Das, I. .
PHYSICAL REVIEW B, 2006, 74 (17)
[4]   Observation of large low field magnetoresistance and large magnetocaloric effects in polycrystalline Pr0.65(Ca0.7Sr0.3)0.35MnO3 [J].
Biswas, Anis ;
Samanta, Tapas ;
Banerjee, S. ;
Das, I. .
APPLIED PHYSICS LETTERS, 2008, 92 (01)
[5]   SIZE-INDUCED DIFFUSE PHASE-TRANSITION IN THE NANOCRYSTALLINE FERROELECTRIC PBTIO3 [J].
CHATTOPADHYAY, S ;
AYYUB, P ;
PALKAR, VR ;
MULTANI, M .
PHYSICAL REVIEW B, 1995, 52 (18) :13177-13183
[6]  
Cheong S.-W., 1999, Monographs in Condensed Matter Science
[7]   The effect of artificial grain boundaries on magneto-transport properties of charge ordered-ferromagnetic nanocomposites [J].
Das, Kalipada ;
Satpati, B. ;
Das, I. .
RSC ADVANCES, 2015, 5 (35) :27338-27346
[8]   Giant enhancement of magnetoresistance in core-shell ferromagnetic-charge ordered nanostructures [J].
Das, Kalipada ;
Rawat, R. ;
Satpati, B. ;
Das, I. .
APPLIED PHYSICS LETTERS, 2013, 103 (20)
[9]   Surface phase separation in nanosized charge-ordered manganites [J].
Dong, S. ;
Gao, F. ;
Wang, Z. Q. ;
Liu, J. -M. ;
Ren, Z. F. .
APPLIED PHYSICS LETTERS, 2007, 90 (08)
[10]   Ferromagnetic tendency at the surface of CE-type charge-ordered manganites [J].
Dong, Shuai ;
Yu, Rong ;
Yunoki, Seiji ;
Liu, J. -M. ;
Dagotto, Elbio .
PHYSICAL REVIEW B, 2008, 78 (06)
123