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Influence of grain size and grain boundaries on the properties of La0.7Sr0.3CoxMn1−xO3

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Title Influence of grain size and grain boundaries on the properties of La0.7Sr0.3CoxMn1−xO3
 
Creator DAS, S
CHOWDHURY, P
GUNDU RAO, TK
DAS, D
BAHADUR, DHIRENDRA
 
Subject grain boundaries
grain size
curie temperature
spin disorder resistivity
 
Description We have synthesized La0.7Sr0.3Mn0.9Co0.1O3 granular perovskites using ethylenediaminetetraacetic acid (EDTA) as a complexing agent. The influence of grain size and grain boundary structure on the physical properties was investigated. Our results show that decreasing grain size leads to lowering of the ferromagnetic transition temperature, broadening of the transition, decrease in magnetization and enhancement of resistivity and magnetoresistance at low temperatures. Also, electron spin resonance linewidth and g-value will decrease. These results are explained by spin dependent scattering at the grain boundaries and weakening of magnetic interaction near the surface of grains, which reduces the internal field in the system.
 
Publisher Elsevier
 
Date 2009-05-21T04:25:59Z
2011-12-08T07:27:07Z
2011-12-26T13:02:14Z
2011-12-27T05:48:12Z
2009-05-21T04:25:59Z
2011-12-08T07:27:07Z
2011-12-26T13:02:14Z
2011-12-27T05:48:12Z
2002
 
Type Article
 
Identifier Solid State Communications 121(12), 691-695
0038-1098
10.1016/S0038-1098(02)00046-7
http://hdl.handle.net/10054/1395
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1395
 
Language en