Microstructure and magnetism of [Co/Ti] and [Co/Cu(Ni)] multilayers

Two series of the multilayers with the forms of [Co/Ti]30 and [Co/Cu(Ni)]30, prepared by dual facing target sputtering at room temperature, consist of amorphous Co magnetic layer and exhibit soft magnetic properties. The structural and magnetic properties of [Co/Cu(Ni)] and [Co/Ti] multilayers were examined as a function of the spacer layer thickness (dTi and dCu(Ni)) by XRD, TEM and VSM measurements. The saturation magnetization Ms of the [Co/Ti] multilayer was found to decrease with dTi, but for the [Co/Cu(Ni)] multilayers, the Ms was found to oscillate with dCu(Ni). The Ms approached to a constant value when dTi and dCu(Ni) thickened enough. This is the result of different interlayer magnetic coupling effects.