Preparation of High-B_(S) Co-Fe Soft Magnetic Thin Films by Electrodeposition

摘要

Co-Fe soft magnetic thin films with high-saturation magnetic flux density B_(s) were prepared by electrodeposition. The B_(s) value of the Co-Fe alloy films deposited from the conventional cell system is lower than that of bulk alloys. With the use of a separated compartment dual cell system, the B_(s) value of the Co-Fe alloy films was reached the same as that of bulk alloy. The coercivity H_(c) values were higher than 12 Oe; however, the H_(c) value could be lowered to 8 Oe by annealing in vacuum with an applied magnetic field. It is suggested that decreasing H_(c) of the films by annealing is caused by relaxation of lattice distortion. In addition, the high-B_(s) Co-Fe films show good corrosion resistance.