CONSTRUCTION OF MAGNETIC FORCE MICROSCOPE AND ITS APPLICATION TO MAGNETIC MULTILAYER FILM

The construction of magnetic force microscope (MFM) operating in air a t room temperature has been explained. The magnetic domain in the Co-P d multilayer film(Co (4.0 Angstrom)/Pd (13.2 Angstrom)x17 layers) was studied with our home-made MFM. The MFM image obtained under an ambien t condition in the earth's magnetic field showed a natural magnetic do main structure. The lines of the image seems to be the domain walls wi th the thickness of about 500-1000 Angstrom. The contrast of magnetic structure is dominant compared to that of the topographic structure wh en the magnetic tip is at the position about 1000 Angstrom away from t he magnetic sample surface. The finest structure observed in our MFM i mages is of order about 500-1000 Angstrom.