Non-magnetic substrate material

Details Non-magnetic substrate material Non-magnetic substrate material

1984-03-20

1985-09-10

Williams, Howard S.

Stock material or miscellaneous articles

Composite

Of inorganic material

423594, 423599, 428469, 428900, 501 1, 501153, B32B 1500

Patent

active

045406383

ABSTRACT:
A thin film magnetic material assembly for a magnetic head which has a non-magnetic substrate material and a magnetic metallic film vapor deposited thereon. The substrate material has a thermal coefficient of expansion approximating that of the magnetic metallic film. The substrate has a NaCl lattice structure and a composition represented by the formula Ni.sub.x Mn.sub.2-x O.sub.2 where 0.25.ltoreq.x<1. The substrate can optionally contain not more than 10% by weight of at least one of the group Al, Cr, Si, Sn, Ba as a secondary component. The magnetic metallic film most suitable in connection with the present invention is Fe-Ni, Fe-Al-Si or similar based alloys.

REFERENCES:
patent: 3380919 (1968-04-01), Wickham

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