Gradientless propulsion of magnetic bubble domains using modulat

Details Gradientless propulsion of magnetic bubble domains using modulat Gradientless propulsion of magnetic bubble domains using modulat

1977-01-12

1978-10-03

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

In-plane field

365 3, G11C 1908

Patent

active

041187938

ABSTRACT:
Magnetic bubble domains are propagated in a magnetic medium in a desired direction using in-plane magnetic fields which are time varying but which have no spatial gradients. In applications such as information storage, the need for conventional propagation structures, such as offset conductor loops, patterned magnetic elements, and patterned ion implantation regions is reduced. Bubble domains having unwinding pairs of Bloch lines in their wall magnetization can be moved by applying appropriate in-plane magnetic fields, without the need for spatial gradients or variations in the magnetic field normal to the plane of the magnetic medium. The continuous movement of these bubble domains occurs by a cyclic process where the Bloch lines switch between two configurations, in an asymmetric way in response to the time varying in-plane field.

REFERENCES:
patent: 4052710 (1977-10-01), Calhoun et al.
patent: 4068220 (1978-01-01), Argyle et al.
IBM Journal of Research Development, Mar. 1976, pp. 109-122.

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