Temperature dependence of the magnetoresistance in Co/Re superlattices on Al2O3 (11(2)over-bar-0) - art. no. 094404

Using a patterned hcp [Co (17 Angstrom)/Re (7 Angstrom)](20) antiferromagne tically coupled superlattice, with the c axis in the Aim plane, magnetoresi stance (MR) measurements were made in the temperature range between 5 K and room temperature. The MR was simulated and decomposed into its anisotropic magnetoresistance (AMR) and giant magnetoresistance (GMR) components using the magnetization as a function of angle determined from neutron reflectiv ity experiments. We find that the GMR is anisotropic and has a different te mperature dependence than the AMR when I perpendicular to c and a similar d ependence when I parallel toc, where 1 is the applied current. This implies that interface spin-dependent scattering plays a more significant role whe n I perpendicular to c than when I parallel toc.