Characterization and optimization of magnetic garnet films for magneto-optical visualization of magnetic field distributions |
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Authors: | M. Klank, O. Hagedorn, C. Holthaus, M. Shamonin,H. D tsch |
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Affiliation: | a Department of Physics, University of Osnabrück, Osnabrück D-49069, Germany;b H. Rosen Engineering GmbH, Am Seitenkanal 8, D-49811, Lingen (Ems), Germany |
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Abstract: | Rare-earth iron garnet films with in-plane anisotropy grown on (111)-oriented substrates can be used as magneto-optical indicator films for visualization of magnetic leakage fields in nondestructive evaluation. The influence of Faraday rotation, Faraday ellipticity, absorption and film thickness on the performance of a magneto-optical indicator film is investigated. A new optimization method is introduced and compared with the method of contrast optimization. The theory is experimentally verified and an application example is presented. |
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Keywords: | Magneto-optics Imaging Magnetic flux leakage Garnet films |
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