Magnetic recording medium comprising NiFe and CoZr alloy crystal

Details Magnetic recording medium comprising NiFe and CoZr alloy crystal Magnetic recording medium comprising NiFe and CoZr alloy crystal

1990-07-03

1993-09-07

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of inorganic material

428 64, 428336, 428611, 428668, 428900, 428928, 427131, 20419215, 2041922, G11B 500

Patent

active

052427617

ABSTRACT:
A magnetic recording medium and method of manufacture therefor uses a vertically magnetized film (4) backed by a nonmagnetic substrate (1) made of e.g., glass; a Permalloy.RTM. layer is interposed between the magnetized film and the substrate. An additional layer (3) of a soft amorphous magnetic material, e.g. Co-Zr-Nb or Co-Zr of a suitable thickness (e.g. 50 nm) is interposed between the vertically magnetized medium and the Permalloy.RTM. layer for improving crystalline orientation of the vertically magnetized film and the Permalloy.RTM. layer. The additional layer (3) may be deposited by high frequency sputtering while applying a magnetic field othogonal to the substrate.

REFERENCES:
patent: 4414287 (1983-11-01), Kneller et al.
patent: 4657824 (1987-04-01), Howard
patent: 4950548 (1990-08-01), Furusawa et al.

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