Sujatha Devi, P and Kumar, Abhoy and Bhattacharya, Dipten and Karmakar, Shilpi and Chaudhuri, Bijoy Krishna (2010) Correlation between Extrinsic Electroresistance and Magnetoresistance in Fine-Grained La(0.7)Ca(0.3)MnO(3). Japanese Journal Of Applied Physics, 49 (8, P 1). Article No.- 083001 . ISSN 0021-4922

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Abstract

We report our observation of a correlation between the extrinsic electroresistance (EER) and magnetoresistance (EMR) via grain size in fine-grained La(0.7)Ca(0.3)MnO(3) The nature of dependence of EER and EMR on grain size (similar to 0 2-1 0 mu m) indicates that for finer grains with low-resistive boundaries both of them follow similar trend whereas they differ for coarser grains with high-resistive boundaries This could be due to a crossover in the mechanism of charge transport across the grain boundaries-from spin-dependent scattering process to spin-polarized tunneling one-as a function of grain size (C) 2010 The Japan Society of Applied Physics

Item Type:	Article
Subjects:	Refractories
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	09 Feb 2012 11:31
Last Modified:	20 Feb 2012 07:47
URI:	http://cgcri.csircentral.net/id/eprint/722

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