Process for transferring bloch lines formed in a magnetic wall o

Details Process for transferring bloch lines formed in a magnetic wall o Process for transferring bloch lines formed in a magnetic wall o

1987-07-13

1990-11-27

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Strip domain

365 36, G11C 1908

Patent

active

049742019

ABSTRACT:
A process for transferring Bloch lines formed in a magnetic wall of a magnetic domain and a magnetic memory apparatus for recording/reproducing information in utilizing Bloch lines formed in the magnetic wall of the magnetic domain as a information carrier are disclosed. The process comprises steps of forming a positive or negative magnetic charge area in the magnetic wall, thereby attaching a Bloch line to the area, and moving the magnetic charge area, thereby moving the Bloch line. The apparatus comprises a memory substrate having a stripe-shaped magnetic domain, a way to write Bloch lines in the magnetic wall of the stripe-shaped magnetic domain according to input information, a way to read the Bloch lines so stored to reproduce the information in the form of electric signals and a way to apply a rotating magnetic field parallel to the plane of the memory substrate, to the stripe-shaped magnetic domain, to move the Bloch lines along the magnetic wall. As a result, the Bloch lines so written are transferred in succession to another location in the domain or to a read-out area.

REFERENCES:
patent: 3887905 (1975-06-01), Bobeck et al.
patent: 4128895 (1978-12-01), Almasi et al.
patent: 4583200 (1986-04-01), Konishi et al.
patent: 4589094 (1986-05-01), Takauchi et al.
IEEE Transactions on Magnetics-vol. Mag-8, Sep. 1972; pp. 405-407.
"Charged Wall Formation and Propagation Analysis in Ion-Implanted Contiguous Disk Bubble Devices:", J. Appl. Phys., vol. 53, No. 8, pp. 5815-5822, Aug. 1982.
"Vertical Bloch Line Pair Operation by In-Plane Field for Bloch Line Memory", IEEE Transactions on Magnetics, vol. Mag-22, No. 5, pp. 793-795, Sep. 1986.

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