Thermally stable magnetic film which resists hard bubbles

Details Thermally stable magnetic film which resists hard bubbles Thermally stable magnetic film which resists hard bubbles

1980-11-10

1982-10-05

Page, Thurman K.

Stock material or miscellaneous articles

Composite

Of inorganic material

427 531, 427 82, 427130, 428336, 428611, 428900, H01F 100, B05D 306

Patent

active

043528627

ABSTRACT:
Disclosed is a crystalline magnetic film having at least two rare-earth elements symmetrically disposed at lattice sites in the film's interior to there produce a magnetic moment perpendicular to the film's surface; and having those same rare-earth elements less symmetrically disposed at lattice sites in a region at the film's surface, to there produce a magnetic moment parallel to the surface. This in-plane magnetic moment resists hard bubbles from forming in the film; and it is stable at temperatures over 500.degree. C.

REFERENCES:
patent: 3991233 (1976-11-01), Verhulst et al.
patent: 4042341 (1977-08-01), Smeggil
patent: 4104422 (1978-08-01), Sandfort
patent: 4171389 (1979-10-01), Gyorgy et al.
patent: 4214918 (1980-07-01), Gat et al.

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