GIANT MAGNETORESISTANCE OF ELECTRODEPOSITED CONICU CU MULTILAYERS/

Giant magnetoresistance (GMR) has been studied in electrodeposited CoN iCu/Cu multilayers. The value of the change of resistance with field, Delta R, is almost constant when the temperature is lowered to 15 K, w hereas the GMR = Delta R/R is, of course, increased. The magnetic fiel d dependence is unchanged with temperature, demonstrating that the GMR is not thermally activated. Lorentz electron microscopy was used to i nvestigate the nature of the magnetic domains. The layers are antiferr omagnetically coupled, and the domains extend without interruption for approximate to 200 nm along the layers.