Magnetic domain imaging in coated silicon-iron using magnetoresistive sensors

Author

So, M.H. ; Nicholson, P.I. ; Meydan, T. ; Moses, A.J.

Author_Institution

Sch. of Eng., Univ. of Wales Coll. of Cardiff, UK

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3370

Lastpage

3372

Abstract

This paper presents the application of permalloy magneto-resistive sensors for non destructive magnetic domain imaging of coated Si-Fe sheets. The principles of measurement, arrangement of the sensor, operating conditions and examples of the application results are described. The presented method is based on the measurement of stray fields above the sheet surface. The domain images mapped by computer from field measurements, agree well with those obtained using a commercial domain viewer. The advantage of the presented MR based system is its suitability for automated product inspection

Keywords

ferromagnetic materials; iron alloys; magnetic domains; magnetic sensors; magnetoresistive devices; silicon alloys; Fe-Si; automated product inspection; coated silicon-iron sheets; nondestructive magnetic domain imaging; permalloy magneto-resistive sensors; stray field measurement; Application software; Helium; Image sensors; Magnetic domains; Magnetic field measurement; Magnetic materials; Magnetic sensors; Sensor phenomena and characterization; Sheet materials; Steel;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.490385

Filename

490385