Domain drag effect devices

Details Domain drag effect devices Domain drag effect devices

1978-11-13

1980-12-09

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Bias

365 19, 365 25, 365 34, G11C 1908

Patent

active

042388376

ABSTRACT:
A domain drag effect stripline pattern of conductive magnetic bubble material deposited upon a substrate is located in a magnetic bias field preferably normal to the plane of the stripline. Magnetic bubbles can be propagated through the stripline in response to passage of D.C. current pulses through the stripline. The width and cross-sectional area of the stripline is preferably substantially constant except at a switching area where it may be different, and preferably wider. There a coil is juxtaposed with the stripline to apply a magnetic field upon the switching area with the magnetic field varying above and below a critical value to switch the propagation of magnetic bubbles along the stripline on and off as a function of the current through the coil. Alternatively, the external magnetic bias field can be modulated to turn the stripline switch on and off. In another aspect of this invention a domain drag effect velocity modulator apparatus is provided at modulation points by varying the magnetic field at the modulation points. Such modulation can slow down or speed up the bubble velocity, depending upon the design.

REFERENCES:
IEEE Transactions on Magnetics-vol. Mag-14; No. 5, Sep. 1978, pp. 500-502.

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