Device for close-packed magnetic domains

Details Device for close-packed magnetic domains Device for close-packed magnetic domains

1978-06-27

1980-08-19

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Multiple magnetic layer

365 3, 365 19, G11C 1115, G11C 1908

Patent

active

042187621

ABSTRACT:
A device for storing digital information in the form of magnetic domains including at least two ferrimagnetic layers on a substrate. The ferrimagnetic layers are separated by a compensation wall and in the presence of a bias magnetic field single magnetic domains and superposed magnetic domain pairs, the superposed domains being separated by a compensation wall, are generated. All single and superposed domains are mutually repulsive. The domains within a superposed pair are attracted to each other. The generated domains are propagated to a shift register and when the reigster is filled a row of domains is coincidentally propagated, transversely out of the register, to a domain array region adjacent the register. Rows are then propagated through the array region to a second shift register where they are individually detected and annihilated. A control device assures the proper working relationship between all elements.

REFERENCES:
patent: 3996571 (1976-12-01), Chang
patent: 4151602 (1979-04-01), Haisma et al.
IEEE Transactions on Magnetics, vol. Mag.-10, No. 3, Sep. 1974, pp. 630-633.

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