Sonic magnetic domain sensor

Details Sonic magnetic domain sensor Sonic magnetic domain sensor

1976-03-29

1978-06-06

Moffitt, James W.

Static information storage and retrieval

Magnetic bubbles

Detectors

365 2, 365 15, 365 33, 365 34, 365157, G11C 1908

Patent

active

040940039

ABSTRACT:
This bubble domain sensor is capable of sensing the presence or absence of a bubble at a predetermined location within bubble supporting material regardless of whether the bubble is stationary or moving through that location. A magnetostrictive material layer, such as a thin film having an area approximately equal to the area of a bubble domain, is positioned with respect to the bubble material such that it is magnetically influenced by the closure field of a bubble at the predetermined location. A conductor, such as a strip conductor, is positioned in contact with the magnetostrictive material. A sonic device launches sonic wave pulses which pass in the vicinity of the magnetostrictive material layer. The sonic wave pulse stresses the magnetostrictive material, and when the magnetostrictive material is magnetically influenced by a bubble, the stress changes or rotates its magnetization thereby inducing an electric signal in the conductor. When a bubble is not near the magnetostrictive material, no signal will be produced. The sonic wave pulse may be launched as either a surface wave on, or a bulk wave in the bubble supporting material, or it may be launched in a material substrate, capable of supporting acoustic waves, which is in contact with the magnetostrictive material. The shape of the magnetostrictive thin film element may have different geometrics, including long strips.

REFERENCES:
patent: 3151316 (1967-09-01), Bobeck
patent: 3673582 (1972-06-01), Clover, Jr.
patent: 3836897 (1974-09-01), Marsh

Affiliated with

Also associated with

Rating

Sonic magnetic domain sensor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sonic magnetic domain sensor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sonic magnetic domain sensor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1496240