Static information storage and retrieval – Magnetic shift registers
Reexamination Certificate
2007-01-12
2009-02-17
Barrera, Ramon M (Department: 2832)
Static information storage and retrieval
Magnetic shift registers
Reexamination Certificate
active
07492622
ABSTRACT:
A method and structure for depinning a domain wall that is in spatial confinement by a pinning potential to within a local region of a magnetic device. At least one current pulse applied to the domain has a pulse length sufficiently close to a precession period of the domain wall motion and the current pulses are separated by a pulse interval sufficiently close to the precession period such that: the at least one current pulse causes a depinning of the domain wall such that the domain wall escapes the spatial confinement; and each current pulse has an amplitude less than the minimum amplitude of a direct current that would cause the depinning if the direct current were applied to the domain wall instead of the at least one current pulse. The pulse length and pulse interval may be in a range of 25% to 75% of the precession period.
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Parkin Stuart
Thomas Luc
Barrera Ramon M
International Business Machines - Corporation
Schmeiser, Olsen & Watts;
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