Spectroscopic ellipsometry and magneto-optical Kerr effect spectroscopy study of thermally treated Co 60 Fe 20 B 20 thin films

We report the optical and magneto-optical properties of amorphous and crystalline Co Fe B films with thicknesses in the range of 10 nm to 20 nm characterized using spectroscopy ellipsometry (SE) and magneto-optical Kerr effect (MOKE) spectroscopy. We derived the spectral dependence of the dielectric...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2020-01, Vol.32 (5), p.055702
Main Authors: Hoffmann, Maria A, Sharma, Apoorva, Matthes, Patrick, Okano, Shun, Hellwig, Olav, Ecke, Ramona, Zahn, Dietrich R T, Salvan, Georgeta, Schulz, Stefan E
Format: Article
Language:English
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Summary:We report the optical and magneto-optical properties of amorphous and crystalline Co Fe B films with thicknesses in the range of 10 nm to 20 nm characterized using spectroscopy ellipsometry (SE) and magneto-optical Kerr effect (MOKE) spectroscopy. We derived the spectral dependence of the dielectric tensor from experimental data for samples prior and after annealing in vacuum. The features of the dielectric function can be directly related to the transitions between electronic states and the observed changes upon annealing can be ascribed to an increase of the crystalline ordering of CoFeB.
ISSN:0953-8984
1361-648X
DOI:10.1088/1361-648X/ab4d2f