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Amorphous Magnetoelastic Materials

Published online by Cambridge University Press:  16 February 2011

H. T. Savage and
Marilyn Wun-Fogle
H. T. Savage
Affiliation:
BCS Inc., 1003g Sunnyvale Lane, Madison, WI 53713
Marilyn Wun-Fogle
Affiliation:
NSWC, Carderock, Code 684, Silver Spring, MD 20903-5000
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Abstract

The outstanding feature of amorphous magnetoelastic alloys is the controllability of the magnetic anisotropy energy, Curie point, magnetostriction and magnetic moment. This control of material characteristics, achieved by magnetic and stress annealing plus changes incomposition, is impossible in crystalline materials. The control allows the design of tactile and magnetic field sensors with special features and very high sensitivity. The materials discussed are prepared by rapid solidification through melt spinning in ribbon and wire geometries and magnetron sputtering onto substrates. As an example of the advantagesof sputtered material, an accelerometer on silicon micro-cantilevers is shown. I-t has nocoils. The basic magnetoelastic theory that governs tactile sensors is shown. Low-noise magnetic field sensors with novel twist anisotropies and Barkhausen instabilities in wiresare discussed.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 360 , 1994, 201
Copyright
Copyright © Materials Research Society 1995

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References

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