CPP GIANT MAGNETORESISTANCE OF NIFECO CU/COFE/CU MULTILAYERS/

CPP (Current perpendicular-to-plane) magnetotransport measurements hav e been performed on lithographically patterned magnetic multilayers of NiFeCo/Cu/CoFe/Cu, We implement chemical-mechanical polishing produce very low Cu-Cu interface resistance that allows accurate, intrinsic g iant magnetoresistance (GMR) values to be obtained, Measured GMR is fo und to be dependent on device size but can be interpreted as the chang e in the resistivity of the magnetic multilayer and the effects of non uniform current distribution. Computer simulations account for the non -uniform current distribution and allow us to determine the intrinsic CPP GMR and verify the negligible contact resistance in these structur es.