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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/10947

Title: Influence of grain size and grain boundaries on the properties of La0.7Sr0.3CoxMn1-xO3
Authors: DAS, S
CHOWDHURY, P
RAO, TKG
DAS, D
BAHADUR, D
Keywords: giant magnetoresistance
transport-properties
perovskites
particle
Issue Date: 2002
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: SOLID STATE COMMUNICATIONS, 121(12), 691-695
Abstract: 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 .
URI: 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
ISSN: 0038-1098
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