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A new ultra-violet magneto-optical spectroscopic instrument and its application to Co-based multilayers and thin films

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2 Author(s)
W. P. Van Drent ; Inf. & Storage Mater. Lab., Toyota Technol. Inst., Nagoya, Japan ; T. Suzuki

A magneto-optic measurement system for the 1.4-6.8 eV photon energy range (λ=182-886 nm) is realized. A new technique to calibrate the applied modulator in-situ, essential for accurate measurements over such a wide range of photon energies, is demonstrated. Measurements at Co/Pt multilayers with 3 Å Co layers and various Pt layer thicknesses indicate a peak for the polar Kerr rotation (~-0.5°) at about 5.1 eV, which is not present in CoPt3 alloy film. This feature may be partly due to quantum well effects, but there is also a possibility for an optical interference effect. Furthermore, positive Kerr rotations up to about +0.4° were found at photon energies above 5.7 eV

Published in:

IEEE Transactions on Magnetics  (Volume:33 ,  Issue: 5 )