Patent ID: 6183568
Filing Date: 2001-02-06
Classification: G11B,H01F,Y10T

Abstract:
A method for producing a soft magnetic thin film comprising:forming an amorphous alloy film of a single layer structure represented by the compositional formula Fe.sub.a T.sub.b N.sub.c, wherein a, b and c stand for atomic percent and T stands for at least one selected from the group consisting of Zr, Hf, Ti, Nb, Ta, V, Mo and W and wherein the composition is in the range of 0<b.ltoreq.20 and 0<c.ltoreq.22 with the exclusion of the range wherein both b.ltoreq.7.5 and c.ltoreq.5, andheat-treating said amorphous alloy film at a temperature of 350.degree. C. to 650.degree. C. to form microcrystalline grains having a grain size of 30 nm or less, thereby producing a coercivity Hc of 1.5 Oe or less, and thermally stable soft magnetic properties as against heating to a temperature of at least 350.degree. C.