Bias magnet temperature tracking of magnetic bubble memories

Details Bias magnet temperature tracking of magnetic bubble memories Bias magnet temperature tracking of magnetic bubble memories

1983-09-23

1986-09-23

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Bias

365 32, 428692, G11C 1908

Patent

active

046139559

ABSTRACT:
Wide temperature range magnetic bubble memories are realized by using new compositions of rare earth garnets which require nonlinear bias field for operation over a given temperature range. The bias field structure for providing the corresponding nonlinear bias field includes plates of barium ferrite plus additional plates of Ni-Cu alloys and/or polycrystalline dysprosium (or other rare earths, singly or in combination) iron garnet to provide a nonlinear bias field versus temperature characteristic to match that of the bubble layer.

REFERENCES:
patent: 3968481 (1976-07-01), Grundy et al.
patent: 4150440 (1979-04-01), Bonnie et al.

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