Tripathi, Rahul and Awana, V. P. S. and Panwar, Neeraj and Bhalla, G. L. and Habermier, H. U. and Agarwal, S. K. and Kishana, H. (2009) Enhanced room temperature coefficient of resistance and magnetoresistance of Ag-added La0.7Ca0.3−xBaxMnO3 composites. Journal of Physics D: Applied Physics, 42 (17). 175002-1-175002-7. ISSN 1361-6463

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Abstract

In this paper we report an enhanced temperature coefficient of resistance (TCR) close to room temperature in La0.7Ca0.3−xBaxMnO3 + Agy (x = 0.10, 0.15 and 0 ≤ y ≤ 1.0) (LCBMO + Ag) composite manganites. The observed enhancement of TCR is attributed to the grain growth and opening of new conducting channels in the composites. Ag addition has also been found to enhance intragranular magnetoresistance. Intergranular MR, however, is seen to decrease with Ag addition. The enhanced TCR and MR at/near room temperature open up the possibility of the use of such materials as infrared bolometric and magnetic field sensors, respectively.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s IOP PUBLISHING.
Subjects:	Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	28 Aug 2012 06:35
Last Modified:	28 Aug 2012 06:35
URI:	http://npl.csircentral.net/id/eprint/488

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