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An asymmetrical magneto-impedance (MI) effect in almost zero magnetostrictive amorphous wires is obtained using torsion annealing and then magnetizing with a high frequency current biased with a DC current. A highly sensitive MI characteristic showing a field detection sensitivity of more than 100%/Oe was realized in the wire annealed with 450 turn/m torsion at 500°C, inducing a spiral anisotropy. The change of the torsion direction from clockwise to anti-clockwise inverts the asymmetrical MI effect. A sensitive linear field sensor is successfully constructed using a pair of the asymmetrical MI heads without bias coils
Published in:
Magnetics, IEEE Transactions on
(Volume:35
,
Issue:
5
)
Date of Publication: Sep 1999
- Page(s):
- 3610 - 3612
- ISSN :
- 0018-9464
- INSPEC Accession Number:
- 6418760
- Digital Object Identifier :
- 10.1109/20.800606
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Sep 1999
- Sponsored by :
- IEEE Magnetics Society
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