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Magnetic arrays and their resonant frequencies for the production of binary codes

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2 Author(s)
Schrott, A.G. ; Res. Div., IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA ; von Gutfeld, R.J.

An array of cantilevers of varying lengths containing at least a layer of magnetic material has been fabricated to produce oscillations at the resonant frequencies of the cantilevers via magneto-mechanical coupling. The acoustic or magnetic fields resulting from the oscillations were detected using microphones or detection coils. The presence or absence of an oscillation at a given frequency of a preselected set of frequencies was used to represent a "1" or a "0", respectively, to create a binary code. The array can be designed and assembled to serve as a multibit magnetic tag.

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Magnetics, IEEE Transactions on  (Volume:34 ,  Issue: 5 )