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

  • Shamonin M
  • Klank M
  • Hagedorn O
 et al. 
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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 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.

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  • M Shamonin

  • M Klank

  • O Hagedorn

  • H Dötsch

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