Cylindrical magnetic domain element

Details Cylindrical magnetic domain element Cylindrical magnetic domain element

1975-03-07

1978-04-25

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Guide structure

365 2, 365 8, 365 11, 365 12, 365 34, 365 43, G11C 1908

Patent

active

040866610

ABSTRACT:
A cylindrical magnetic domain element is disclosed which utilizes a cylindrical magnetic domain (a magnetic bubble) produced by the application of a bias magnetic field to a magnetic sheet of orthoferrite, garnet or the like. Propagation patterns for the cylindrical magnetic domain are composed of a plurality of sets formed on one side of the magnetic sheet and have a multilayer construction with a non-magnetic film of SiO.sub.2 or the like between the layers. This multilayer construction allows for the formation of a propagation pattern having a relatively narrow pattern gap. Further, the propagation pattern is disclosed as having uniaxial magnetic anisotropy, which facilitates the magnetic bubble propagation and ensures retaining of the magnetic bubble.

REFERENCES:
patent: 3689901 (1972-09-01), Bobeck
patent: 3699551 (1972-10-01), Fischer
American Institute of Physics Conference on Magnetism and Magnetic Materials, Dec. 3-6, 1974; S.F. Cal. pp. 645-646.
IBM Technical Disclosure Bulletin-vol. 15, No. 8, Jan. 1973, p. 2649.
IBM Technical Disclosure Bulletin-vol. 15, No. 7, Dec. 1972, p. 2220.

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