Feasibility of magneto-optic flaw visualization using thin garnet films

Autor(en): Shamonin, M
Beuker, T
Rosen, P
Klank, M
Hagedorn, O
Dotsch, H
Stichwörter: ANISOTROPY; flaw visualization; garnet films; imaging; KNOW-HOW; KNOW-WHY; LEAKAGE FIELD METHOD; magnetic aux leakage; magneto-optics; Materials Science; Materials Science, Characterization & Testing; SUSCEPTIBILITY
Erscheinungsdatum: 2000
Herausgeber: ELSEVIER SCI LTD
Journal: NDT & E INTERNATIONAL
Volumen: 33
Ausgabe: 8
Startseite: 547
Seitenende: 553
Zusammenfassung: 
We investigate the feasibility of using rare-earth iron garnet films grown on (Ill)-oriented substrates as magneto-optic indicator films for the visualization of magnetic leakage fields in non-destructive evaluation. In most cases the leakage field of the defect has a strong component in the film plane. The influence of this in-plane de magnetic field on the image formation is investigated. It is shown that the presence of a strong in-plane magnetic field allows one to extend the dynamic range of the out-of-plane field imposed by the uniaxial anisotropy field H-A. On the other hand, an in-plane field reduces the sensitivity. The guidelines for selecting parameters of magneto-optic indicator films are given. (C) 2000 Elsevier Science Ltd. All rights reserved.
ISSN: 09638695
DOI: 10.1016/S0963-8695(00)00028-1

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