PERPENDICULAR GIANT MAGNETORESISTANCE IN MAGNETIC MULTILAYERS DEPOSITED ON GROOVED SUBSTRATES

We have deposited Co/Cu magnetic multilayers at an angle onto grooved InP substrates with 0.2 mu m groove period and measured the giant magn etoresistance with the current perpendicular to the layer plane. We ha ve determined as a function of temperature the spin-dependent scatteri ng parameters due to magnetic bulk and interface scattering, using the two channel model for electron transport. We find that the decrease o f the magnetoresistance from 4.2 K to room temperature is mainly due t o an increase of the Co and Cu bulk resistivities, while the temperatu re dependence of the interface resistance and of the spin-asymmetry sc attering parameters is very small.