Acoustical Imaging pp 347-370 | Cite as
Magnetosonic Image Converter
Abstract
One of the more recent works concerned with the storage of stress information by means of magnetic thin films was that of Weinstein et al (1) and their Sonic Film Memory. In this memory, strain pulses were used in conjunction with current pulses to store digital information in a magnetostrictive thin film evaporated onto a glass cylinder. The easy axis of magnetization was circumferential around the cylinder. A conductor ran down the center of the glass cylinder and a transducer for generating sonic waves was mounted on the end of the cylinder. The transducer generated a 10 nanosecond pulse of ultrasound which propagated down the cylinder. A current pulse was also sent down the conductor. The magnetization of a particular location or band could be changed if the strain pulse and current pulse arrived at that location at the same instant of time.
Keywords
Current Pulse Shot Noise Ultrasonic Transducer Magnetic Film Analyzer AnglePreview
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References
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