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Control of a magnetoelastic sensor temperature response by magnetic field tuning

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3 Author(s)
Ong, Keat G. ; State Coll., Sentech Corp., State College, PA, USA ; Mungle, C.S. ; Grimes, Craig A.

A method is reported for controlling the frequency-temperature response of ribbon-shaped magnetoelastic sensors by adjusting the strength of an applied dc biasing field. By controlling the temperature response, a magnetoelastic sensor can be made temperature independent, facilitating their application as pressure, stress, and chemical sensors. Conversely, the temperature dependency of the magnetoelastic sensor can be maximized for use as temperature sensors. In this work we show the temperature response of the magnetoelastic sensor can be negative, positive, or zero by varying the dc biasing field. Experiments have been conducted to illustrate the shift in temperature response with dc biasing field.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 5 )