Bloch line memory device

Details Bloch line memory device Bloch line memory device

1988-09-08

1990-08-14

Moffitt, James W.

Static information storage and retrieval

Magnetic shift registers

Thin film

365 29, G11C 1908

Patent

active

049493043

ABSTRACT:
In a Bloch line memory device, information corresponds to the presence or absence of a Bloch line pair present in the magnetic wall of a stripe magnetic domain. Reading of information is effected by converting the presence and absence of a Bloch line pair into the presence and absence of a magnetic bubble domain. The conversion is effected such that, after the stripe magnetic domain has been shrunk in such a manner that no Bloch line is present therein, a magnetic field for chopping off the stripe magnetic domain is applied to the shrunken portion. Thus, when a Bloch line is present at an end portion of the stripe magnetic domain, the stripe magnetic domain is chopped off to form a magnetic bubble domain, whereas, when no Bloch line is present at the end portion of the stripe magnetic domain, the stripe magnetic domain is not chopped off and therefore no magnetic bubble domain is formed. Whether the magnetic bubble domain is present or absent is processed as information.

REFERENCES:
patent: 4731752 (1988-03-01), Hidaka

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