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Dynamic Magneto‐Optical Imaging of Domains in Grain‐Oriented Electrical Steel
Author(s) -
Richert Hendryk,
Schmidt Heidemarie,
Lindner Sandra,
Lindner Morris,
Wenzel Benjamin,
Holzhey Rocco,
Schäfer Rudolf
Publication year - 2016
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201500013
Subject(s) - materials science , magneto , electrical steel , magnetization , magnetic field , grain size , image resolution , optics , magneto optical , optoelectronics , composite material , magnet , electrical engineering , physics , quantum mechanics , engineering
Magneto‐optical imaging with magneto‐optical indicator films (MOIF) is a versatile method to characterize magnetic field distributions especially for material development and quality control. Magnetic domains and grains in grain‐oriented electrical steel can be visualized, and quantified without removing the isolation layer. The combination of MOIF with digital high‐speed camera technology enables temporally resolved investigations of the magnetization processes. In contrast to Kerr‐effect measurements MOIF imaging works without sample preparation and even in the presence of industrial insulation coatings. Optical resolution of 25 microns and temporal resolution of 1 ms in single‐shot mode could be demonstrated.