Perpendicular giant magnetoresistance in magnetic multilayers deposited on grooved substrates

摘要

We have deposited Co/Cu magnetic multilayers at an angle onto grooved InP substrates with 0.2 mum groove period and measured the giant magnetoresistance with the current perpendicular to the layer plane. We have determined as a function of temperature the spin-dependent scattering parameters due to magnetic bulk and itnerface scattering, using the two channel model for electron transport. We find that the decrease of the magnetoresistance from 4.2 K to room temperature is mainly due to an increase of the Co and cu bulk resistivities, while the temperature dependence of the interface resistance and of the spin-asymmetry scattering parameters is very small.