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On the origin of magnetoresistance in $Sr_2FeMoO_6$

Sarma, DD and Ray, Sugata and Tanaka, K and Fujimori, A (2003) On the origin of magnetoresistance in $Sr_2FeMoO_6$. [Preprint]


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We report detailed magnetization ($M$) and magnetoresistance ($MR$) studies on a series of $Sr_2FeMoO_6$ samples with independent control on anti-site defect and grain boundary densities. These results, exhibiting a switching-like behavior of $MR$ with $M$, establish that the $MR$ is controlled by the magnetic polarization of grain boundary regions, rather than of the grains within a resonant tunnelling mechanism.

Item Type: Preprint
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 03 May 2006
Last Modified: 19 Sep 2010 04:26
URI: http://eprints.iisc.ac.in/id/eprint/6545

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