Thin Film Magneto-Impedance Sensor Integrated Into 1 FePt Thin Film Bias Magnet

A linear magneto-impedance (MI) sensor integrated into a FePt thin film bias magnet which has in-plane isotropic magnetic property was investigated. The maximal bias field of 13.1 Oe was obtained after magnetizing a 1.3-mum thick FePt film in longitudinal direction of the sensor element. The bias fi...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2008-11, Vol.44 (11), p.3977-3980
Main Authors: Ohmori, K., Tan, K., Itoi, K., Nagasu, K., Uemichi, Y., Aizawa, T., Yamauchi, R.
Format: Article
Language:English
Subjects:
Amorphous magnetic materials
Bias field
Fabrication
Image sensors
Magnetic anisotropy
Magnetic films
Magnetic sensors
Magnetic separation
magnetizing angle
magneto-impedance (MI)
Magnetostatics
Perpendicular magnetic anisotropy
thin film magnet
Thin film sensors
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Summary:A linear magneto-impedance (MI) sensor integrated into a FePt thin film bias magnet which has in-plane isotropic magnetic property was investigated. The maximal bias field of 13.1 Oe was obtained after magnetizing a 1.3-mum thick FePt film in longitudinal direction of the sensor element. The bias field changed with the magnetizing angle. By controlling the angle in the magnetizing direction of the bias magnet and sensing direction, it was shown to be able to adjust the effective bias field after fabrication of the sensor element.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2008.2002863