Magnetic domain bias field assembly

Details Magnetic domain bias field assembly Magnetic domain bias field assembly

1975-02-18

1978-01-10

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Bias

365 1, G11C 1908

Patent

active

040682196

ABSTRACT:
An improved bias field assembly for reducing power losses in a magnetic domain memory device. A preferred embodiment employs rectangular permanent magnets positioned above and below a drive coil/substrates assembly. Ferrite shields of the same general size as the permanent magnets are interposed between the magnets and the drive coil/substrates assembly. These shields provide a highly resistive, relatively impermeable path for induced eddy currents and flux to reduce the effective resistance of the drive coil during high frequency operation and to minimize hysteresis losses.

REFERENCES:
patent: 3678478 (1972-07-01), Copeland
patent: 3702991 (1972-11-01), Bate et al.
patent: 3742471 (1973-06-01), Mikami
patent: 3786445 (1974-01-01), Ho et al.
patent: 3806899 (1974-04-01), Myer
patent: 3831156 (1974-08-01), Myer
patent: 3864671 (1975-02-01), Myer
patent: 3927397 (1975-12-01), Chow et al.
patent: 3931618 (1976-01-01), Lacey
patent: 3996574 (1976-12-01), Bobeck et al.
IEEE Transactions on Magnetics-vol. Mag-9, No. 3, Sept. 1973, pp. 429-433.
IBM Tech. Disc. Bull., "Magnetic Domain Device Package" by Bogholtz et al., vol. 15, No. 6, 11/72, pp. 2001, 2002.

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