Impedance property of thin film GMI sensor with controlled inclined angle of stripe magnetic domain

The giant magnetoimpedance (GMI) effect of controlled-inclination magnetic stripe domain for a thin-film GMI sensor is investigated. The inclined stripe domain structure has an inclined angle of domain walls against the transverse direction of the rectangular-strip element. It is obtained that GMI p...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2005-04, Vol.290, p.1355-1358
Main Authors: Nakai, T., Abe, H., Yabukami, S., Arai, K.I.
Format: Article
Language:English
Subjects:
Domain structure
Sensors
Thin films
Uniaxial anisotropy
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Summary:The giant magnetoimpedance (GMI) effect of controlled-inclination magnetic stripe domain for a thin-film GMI sensor is investigated. The inclined stripe domain structure has an inclined angle of domain walls against the transverse direction of the rectangular-strip element. It is obtained that GMI profile changes from a profile with a dip point at the zero magnetic field to a profile with one maximum impedance only at the zero field at an angle of 70°. In the case of GMI profile with a dip point, increasing the inclination angle decreases the bias field. This reduction of the bias field more than triples the sensor gain. An excellent linear property extending for wide range is obtained. A steplike impedance change property is also realized by this method.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2004.11.436