US 5,858,548 A · Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Abstract

Corrosion resistance of a magnetic film composed mainly of Fe is maintained while keeping its magnetic properties. A magnetic head having a magnetic core is formed in part of the magnetic thin film, which contains not only an alloy of Fe-metalloid series but also (Al, Ru) or (Al, Rh) and which is thermally treated at a constant temperature to develop the soft magnetic properties. The deterioration of the saturation magnetization and the soft magnetic properties is suppressed by adding (Al, Ru) or (Al, Rh) together. The magnetic film has a high saturation magnetization and excellent soft magnetic properties and is excellent in corrosion resistance and hardness.

Claims16

Dependent claims

A soft magnetic thin film comprising a composition with a general formula of Fe.sub.a T.sub.b Z.sub.c Al.sub.d X.sub.e, wherein T is at least one element selected from the group consisting of Ta, Zr, Hf, Ti and Nb;

Z is at least one element selected from the group consisting of C, B and Si;
and X is at least one element selected from the group consisting of Ru or Rh;
in that said composition has a ratio of a, b, c, d and e which satisfies a relation expressed by the following equations:
5.ltoreq.b.ltoreq.20, 1.ltoreq.c.ltoreq.20,0.5.ltoreq.d.ltoreq.10,0.5.ltoreq.e.ltoreq.5, 1.ltoreq.(d+e).ltoreq.15 and a+b+c+d+e=100, wherein a, b, c, d and e are atomic percentages.

1 more element

Dependencies are inferred from the claim text.

Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Life of this patent

Soft magnetic thin film, and magnetic head and magnetic recording device using the same

Life of this patent

Abstract

Claims16