On the origin of magnetoresistance in Sr2FeMoO6
Abstract
We report detailed magnetization (M) and magnetoresistance (MR) studies on a series of Sr2FeMoO6 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.
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