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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
RAO, TKG
DAS, D
BAHADUR, D
 
Subject giant magnetoresistance
transport-properties
perovskites
particle
maganites
resistivity
magnetoresistivity
electron spin resonance
grain boundary
 
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. (C) 2002 .
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-25T07:58:14Z
2011-12-26T12:56:58Z
2011-12-27T05:46:37Z
2011-08-25T07:58:14Z
2011-12-26T12:56:58Z
2011-12-27T05:46:37Z
2002
 
Type Article
 
Identifier SOLID STATE COMMUNICATIONS, 121(12), 691-695
0038-1098
http://dx.doi.org/10.1016/S0038-1098(02)00046-7
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10947
http://hdl.handle.net/10054/10947
 
Language en