Kumar, Rajesh and Gupta, Ajai K. and Singh, D. P. and Kumar, Vijay and Bhalla , G. L. and Khare, Neeraj (2008) Current-induced effect on resistivity and magnetoresistance of La0.67Ba0.33MnO3 manganite. Journal of Magnetism and Magnetic Materials, 320 (1). pp. 2741-2745. ISSN 0304-8853

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Abstract

The influence of dc biasing current on temperature dependence of resistivity and low-field magnetoresistance (MR) of La0.67Ba0.33MnO3 bulk sample is reported. A prominent finding is the change in resistivity around the insulator-to-metal transition temperature (TIM) and the change in MR around the ferromagnetic transition temperature (TC). The decrease in MR around TC at higher biasing current indicates a strong interaction between carrier spin and spin of Mn ions resulting in a higher alignment of Mn ion spins. Change in resistivity around TIM is interpreted in the framework of percolative conduction model based on the mixed phase of itinerant electrons and localized magnetic polarons.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Elsevier B.V.
Uncontrolled Keywords:	Magnetic field effect; Metal–insulator transitions; Percolation phenomena; Magnetoresistance; La0.67Ba0.33MnO3
Subjects:	Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	05 Apr 2013 07:38
Last Modified:	05 Apr 2013 07:38
URI:	http://npl.csircentral.net/id/eprint/967

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