Method for producing a magnetic bias field

Details Method for producing a magnetic bias field Method for producing a magnetic bias field

1984-02-14

1986-01-28

Sheehan, John P.

Static information storage and retrieval

Magnetic bubbles

Disposition of elements

365 27, 148 3157, 420416, 420435, 420455, 420580, G11C 502

Patent

active

045675767

ABSTRACT:
The invention provides a method for producing a magnetic bias field in a magnetic bubble domain memory device. The method comprises coupling a magnetic bubble domain element with a permanent magnet. The permanent magnet is formed of a rare earth metal-containing alloy for use in the bubble domain memory device in respect of the reversible temperature coefficient of the magnet capable of being in compliance with the temperature coefficient of the bubble disappearance field of the memory device. The alloy characteristically contains nickel as an essential component so that the composition of the alloy is expressed by the formula

REFERENCES:
patent: 3560200 (1971-02-01), Nesbitt et al.
patent: 3701659 (1972-10-01), Buschow et al.
patent: 3931618 (1976-01-01), Lacey
patent: 4063971 (1977-12-01), Geinacher et al.
patent: 4208225 (1980-06-01), Kurz et al.

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