Phys. Rev. Lett. 99, 066602 (2007) [4 pages]Electron Transport in Nanogranular FerromagnetsReceived 10 April 2007; published 6 August 2007 We study electronic transport properties of ferromagnetic nanoparticle arrays and nanodomain materials near the Curie temperature in the limit of weak coupling between the grains. We calculate the conductivity in the Ohmic and non-Ohmic regimes and estimate the magnetoresistance jump in the resistivity at the transition temperature. The results are applicable for many emerging materials, including artificially self-assembled nanoparticle arrays and a certain class of manganites, where localization effects within the clusters can be neglected. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.066602
DOI:
10.1103/PhysRevLett.99.066602
PACS:
72.15.Gd, 71.10.−w, 73.43.Qt, 75.10.−b
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