2003/11/02 by D. D. Sarma, Sarma, D. D., Sugata Ray +6
Chemical Engineering · Materials Science · Physics and Astronomy · #Catalysis and Oxidation Reactions #Magnetic and transport properties of perovskites and related materials #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0311013
4 pages, 4 figures
arxiv created 2003/11/02 · arxiv updated 2009/12/01
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.