Drive field for circular magnetic domain devices

Details Drive field for circular magnetic domain devices Drive field for circular magnetic domain devices

1975-04-29

1977-01-04

Moffitt, James W.

Communications: electrical

Digital comparator systems

340174CB, G11C 1114

Patent

active

040017923

ABSTRACT:
A circular magnetic demain device which includes bias magnets for applying a steady bias magnetic field in a direction normal to a major surface of the device's uniaxial magnetic layer; rotating magnetic field generating means for causing circular magnetic domains generated in the said layer to propagate within the layer along at least one path defined by a permeable circuit pattern formed on the said major surface, the generating means including two pairs of coils having their axes at right angles to each other and in the plane of the said major surface, one pair of coils being operable to provide an oscillating field which is unipolar and stops and starts at zero; and means for providing a holding magnetic field in the direction of the magnetic field provided by the said one pair of coils. In a preferred arrangement the holding magnetic field is provided by tilting the magnetic field of the bias magnets off-normal.

REFERENCES:
patent: 3744042 (1973-07-01), Cutler et al.
IEEE Transactions on Magnetics--vol. Mag-9, No. 3, Sept. 1973, pp. 436-440.

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