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
IEEE Transactions on Magnetics 30 2
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.
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