Method and apparatus for the controlled generation of wall encod

Details Method and apparatus for the controlled generation of wall encod Method and apparatus for the controlled generation of wall encod

1977-03-31

1978-04-18

Canney, Vincent P.

Static information storage and retrieval

Magnetic bubbles

In-plane field

365 19, 365 25, G11C 1908

Patent

active

040854540

ABSTRACT:
Two parallel conductors are positioned on top of a magnetic layer where bubble domains are to be coded. The two parallel conductors are positioned to form a gap therebetween of a particular size. An external in-plane magnetic field is applied to the magnetic layer. The size of the gap is selected such that when current is simultaneously applied in both conductors, a local in-plane field will be formed in the gap which is sufficient for coding bubble wall states and a vertical field will be formed in the gap sufficient to retain a bubble in the gap during the application of current to the conductors. The application of current in the one direction in the conductors codes a bubble with one pair (S = 0) of Bloch lines and the application of current in the opposite direction codes a bubble with no Bloch lines (S = 1).

REFERENCES:
patent: 4001794 (1977-01-01), Voegeli
"Bloch-line Information Writer for Magnetic Bubble Store"-Slonezewski; IBM Tec. Disc. Bul., vol. 18, #3 8/75.
"Bubble Propagation Technique for Improved Stability"-Beauliew; IBM Tec. Disc. Bul., vol. 19, #2, July 1976.
"A New Type of Bubble Motion in Magnetic Garnet Films"-Nakanishi et al.; Japan J. Appl. Phys., vol. 13, (1974), No. 1.

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