Soft magnetic properties of Co-Fe-P and Co-Fe-Sn-P amorphous films formed by electroplating

Abstract

Co-Fe-P and Co-Fe-Sn-P amorphous soft magnetic alloys have been developed by electroplating. These alloys have zero magnetorestrictive compositions and show a high saturation magnetic induction B/sub s/ of 10-13.5 kG and high permeability of 3000-5000 at 5 MHz with 2- mu m thickness. It was found that the addition of Sn to Co-Fe-P improves the corrosion resistance without decreasing saturation magnetic induction. The magnetic domain structures of the thin-film head-shaped cores with Co-Fe-P amorphous films were also observed by the magnetooptical longitudinal Kerr-effect technique. It was observed that the corrosion resistivity of Co-Fe-Sn-P amorphous alloy is superior to that of Co-Fe-P amorphous alloy.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>