THE STUDY OF FERROMAGNETIC RESQNANCE IN WIRE ARRAY OF MULTILAYER Fe/[NiFe/Cu]30

Abstract

The properties of multiayer Fe/[NiFe/Cu]30 wire arrays were investigated by ferromagnetic resonance (FMR) technique. The arrays with wire density of 250 line/mm and 500 line/mm were fabricated utilizing laser hologram lithography and ion beam etching. In the wire array samples, optical peak occurs at higher field than the acoustic peaks and the exchange coupling between the NiFe layers is therefore antiferromagnetic. The optical peak along the easy axis lies closer to its acoustic counterpart than that along the hard axis. For wire arrays the paramagnetic resonance of the Cu layers is much stronger than the continuous film. This shows the degradation of the layer structure after the array fabrication.