Magneto-optical visualization of metal-loss defects in a ferromagnetic plate: experimental verification of theoretical modeling

Autor(en): Shamonin, M
Klank, M
Hagedorn, O
Dotsch, T
Stichwörter: AIRCRAFT; FILMS; INSPECTION; LEAKAGE FIELDS; MAGNETIZATION; Optics; STEEL
Erscheinungsdatum: 2001
Herausgeber: OPTICAL SOC AMER
Journal: APPLIED OPTICS
Volumen: 40
Ausgabe: 19
Startseite: 3182
Seitenende: 3189
Zusammenfassung: 
Rare-earth iron garnet films with in-plane magnetic anisotropy grown on [111]-oriented substrates are promising for the visualization of magnetic leakage fields in nondestructive evaluation. Such magnetooptical films have to be specifically engineered, and we give an example of this technology. To assess the validity and accuracy of finite-element calculations of a magnetization assembly combined with the physical modeling of the image formation, comparisons between calculated and experimentally obtained magneto-optical images of metal-loss defects have been made. A convincing quantitative agreement is demonstrated. It is shown that both physical and computer modeling techniques allow for a predictive engineering design of the prospective applications and provide greater insight into the method. (C) 2001 Optical Society of America.
ISSN: 1559128X
DOI: 10.1364/AO.40.003182

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