Rare-earth iron garnet films with in-plane magnetic anisotropy grown on -oriented substrates are promising for the visualization of magnetic leakage fields in nondestructive evaluation. Such magneto-optical 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.
© 2001 Optical Society of America
(120.4290) Instrumentation, measurement, and metrology : Nondestructive testing
(160.3820) Materials : Magneto-optical materials
(170.0110) Medical optics and biotechnology : Imaging systems
(230.2240) Optical devices : Faraday effect
(230.3810) Optical devices : Magneto-optic systems
Mikhail Shamonin, Michael Klank, Oliver Hagedorn, and Horst Dötsch, "Magneto-Optical Visualization of Metal-Loss Defects in a Ferromagnetic Plate: Experimental Verification of Theoretical Modeling," Appl. Opt. 40, 3182-3189 (2001)