Magneto-Impedance Element Using Amorphous Micro Wire.
Open Access
- 1 January 1994
- journal article
- Published by The Magnetics Society of Japan in Journal of the Magnetics Society of Japan
- Vol. 18 (2) , 493-498
- https://doi.org/10.3379/jmsjmag.18.493
Abstract
A large magneto-impedance (MI) effect was found in amorphous magnetic wires through which a highfrequency current was applied. The amplitude of the induced voltage between the ends of a wire changes by 40∼50% when an external magnetic field of about 10 Oe (∼800 A/m) is applied parallel to the wire axis. This paper reports the principles and basic properties of the MI effect in micro-sized amorphous wires with a composition of (Fe0.06Co0.94)72.5Si12.5B15 and magnetostriction of −10-7, and describes an application to a rotary encoder head using the microsized MI elements having 30μm in diameter and 1 mm in length.Keywords
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