Magnetic recording medium with a zinc cobalt oxide non-magnetic

Details Magnetic recording medium with a zinc cobalt oxide non-magnetic Magnetic recording medium with a zinc cobalt oxide non-magnetic

1989-02-24

1991-06-25

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428 64, 428469, 428659, 428680, 428694, 428701, 428702, 428900, B32B 1500

Patent

active

050266144

ABSTRACT:
A non-magnetic substrate used for a magnetic head comprising a pair of non-magnetic substrates, and a magnetic layer structure sandwiched between the pair of non-magnetic substrates. The magnetic layer structure is comprised, of alternately laminated magnetic layers and intermediate insulating layers. The invention discloses for the substrate material a composition expressed by Zn.sub.x M.sub.y Co.sub.2-x-y O.sub.2, with the proviso that M is Mn or Ni, 0.ltoreq.x.ltoreq.0.4, 0.4.ltoreq.y.ltoreq.1.0, 0.8.ltoreq.x+y.ltoreq.1.0, or CO.sub.x Ni.sub.2-x O.sub.2, with the proviso that 0.2.ltoreq.x.ltoreq.1.8, and having a rock-salt structure.

REFERENCES:
patent: 4540638 (1985-09-01), Sakakihara et al.
patent: 4719148 (1988-01-01), Stoppels et al.

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