Magnetoresistance in nanostructured Co-Ag prepared by mechanical-alloying
FAGAN, ANDREW JOHN
COEY, JOHN MICHAEL DAVID
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Citation:J. M. D. Coey, A. J. Fagan, R. Skomski, J. Gregg, K. Ounadjela, and S. M. Thompson, Magnetoresistance in nanostructured Co-Ag prepared by mechanical-alloying in IEEE Transactions on Magnetics, 30, (2), 1994, pp 666 - 668
Fine cobalt and silver powders have been ball-milled to yield a granular solid of composition CoSoAg7a in the form of coarse powder. The material is an intimate mixture of grains of fcc CO in a silver matrix. The cobalt is in the single-domain size range, and the samples exhibit coercivity (0.07 T at 296 K) and unusual thermomagnetic effects, including field-induced unidirectional anisotropy. There is a large, isotropic negative magnetoresistance, which exceeds 10 95 at 4.2 K.
Series/Report no:IEEE Transactions on Magnetics