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Data tablet utilizing Matteucci effect of amorphous magnetic wire matrix

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6 Author(s)
Kimura, K. ; Dept. of Electr. Eng., Nagoya Univ., Japan ; Kanoh, M. ; Kawashima, K. ; Mohri, K.
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An accurate and reliable data tablet or digitizer was constructed utilizing the Matteucci effect for an amorphous magnetic wire matrix. Cold-drawn amorphous wires with 50-μm diameter having a composition of (Fe6Co94)72.5Si12.5B15 were used in a tablet plane. An AC magnetic field of 140 kHz was perpendicularly applied to the amorphous wires to induce a double-frequency Matteucci voltage between both ends of each amorphous wire. A small DC current of 2-5 mA was applied to the wire-axial direction for initial setting of its circular magnetization direction when the Matteucci voltage was detected. External disturbance fields did not influence on the Matteucci effect in the folded amorphous wires with a small DC current. Hand-written characters were shown on a CRT display using the data tablet

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 6 )