Research and development of high performance soft magnetic thin films

Soft magnetic films for head core materials mainly electrodeposited CoNiFe based films developed by us were introduced. Electrodeposited CoNiFe thin f ilm has high saturation magnetic flux density (B-s) and low coercivity. Mag netic properties except for B-s and corrosion properties of these films wer e depended on very small amount of inclusion such as S and H elements. The increase in resistivity (rho) on the base of this high B-s CoNiFe thin film was developed by controlling very small amount of C inclusion. Finally, ap plication of the film to new type of magnetic recording head was reported.