Title :
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
fDate :
11/1/1995 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
