Oscillations in the Hall resistivity in Co(Fe)/Cu multilayers

The Hall effect and magnetoresistance have been simultaneously measured for the field perpendicular to the plane on Co90Fe10/Cu multilayers for four Cu layer thicknesses corresponding to the first and second peaks and minima of the magnetoresistance oscillations. The magnetization has been measured also in the same geometry. We found that the extraordinary Hall coefficient oscillates as a function of the Cu layer thickness synchronously with the magnetoresistance oscillation, providing evidence for the dominance of a conduction-electron- scattering mechanism correlated with the giant magnetoresistance effect.