Bubble nucleator

Details Bubble nucleator Bubble nucleator

1979-08-13

1981-03-17

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Generators

G11C 1908

Patent

active

042571090

ABSTRACT:
A bubble (domain) generator comprising a pair of relatively long elements of suitable magnetic material, such as permalloy, separated by a narrow gap, near which bubbles will be generated in the bubble film by the combined effect of local in-plane and perpendicular magnetic field components to assist in nucleation. In one embodiment, the gap is formed straight by spaced apart edges between the elements and, in another embodiment, the gap is formed to define an apex by V-shaped by complementary tapered spaced apart edges between the elements. Both embodiments may have their gap edges brought close to the bubble film and may have a current carrying hairpin loop conductor substantially surrounding the gap to assist in nucleation.

REFERENCES:
patent: 3868661 (1975-02-01), Bonyhard et al.

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