Title :
Giant magnetoresistance in melt-spun granular Cu100-xCo x alloys with correlated magnetic moments
Author :
Tiberto, Paola ; Vinai, Franco ; Allia, Paolo ; Knobel, M.
Author_Institution :
IEN Galileo Ferraris, Torino, Italy
fDate :
9/1/1996 12:00:00 AM
Abstract :
A study of giant magnetoresistance (GMR) has been performed on melt-spun ribbons of Cu100-xCox (5⩽x⩽20) subjected to DC Joule heating in order to optimise the GMR response. The GMR results, plotted as functions of the reduced magnetisation, exhibit significant deviations from the parabolic behavior predicted in the case of no correlation among magnetic moments. A simple theory of the GMR in Cu-Co granular systems, taking explicitly into account the correlation existing among the magnetic particles, is highlighted. The effect of both Co content and degree of magnetic correlation on the maximum GMR values attained for each composition is briefly discussed
Keywords :
cobalt alloys; copper alloys; ferromagnetic materials; giant magnetoresistance; granular materials; magnetic moments; magnetic particles; magnetisation; melt spinning; Co content; Cu-Co granular systems; CuCo; DC Joule heating; GMR; GMR response; correlated magnetic moments; giant magnetoresistance; magnetic correlation; magnetic particles; melt-spun granular Cu100-xCox alloys; melt-spun ribbons; parabolic behavior; reduced magnetisation; Cobalt alloys; Copper alloys; Electric resistance; Electronic mail; Giant magnetoresistance; Heating; Magnetic moments; Magnetic particles; Magnetization; Particle scattering;
Journal_Title :
Magnetics, IEEE Transactions on
