Magnetoresistance and magnetic properties of magnetic thin film multilayers

The magnetic properties and the magnetoresistance in correlation with microstructural properties of permalloy monolayer and [NiFe(t)/Cu(s)/NiFe(t)]n or [NiFe(t)/Mo(s)/NiFe(t)] multilayers have been investigated. The thickness (t) of NiFe layers was ranged from 4 to 12 nm, while the copper and molybdenum layers (s) were ranged from 3 to 8 nm. The multilayers exhibit magnetoresistive properties different from those of permalloy film. By decreasing of the NiFe layer thickness and increasing of the non-magnetic interlayer thickness, the influence of interfacial intermixing effects on magnetic properties become more important. gnetic properties of [NiFe/Mo/NiFe] trilayer show a weak ferromagnetic coupling like those presented by the multilayers with a relatively thick non-magnetic interlayer (5–8 nm). gh the thickness of layers has the leading part for magnitude of GMR effect, the microstructural properties of interfaces and the grain boundaries scattering must not be neglected.