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16 May 2007 Depth sensitivity of magneto-optic Kerr effect on FeNbB amorphous ribbons
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Abstract
FeNbB amorphous ribbons are promising soft magnetic materials with adjustable surface magnetic properties. Field-annealing is applied to control nano-crystallized surface magnetic films, which can be monitored by using magneto-optical techniques. In this paper we analyze depth sensitivity of magneto-optic methods and investigate the surface magnetic properties of amorphous ribbons. Magneto-optic response and depth sensitivity is modeled using 4 x 4 matrix formalism of light propagation in anisotropic multilayers. Optical and magneto-optical properties of near surface nano-crystallized phases differ from those of deeper bulk material. The complex longitudinal magneto-optic Kerr effect is measured for s- and p-polarized incident light. Both magneto-optical angles: the Kerr rotation and Kerr ellipticity are analyzed. Separation of magneto-optic contributions from different layers is obtained using different phase sensitive and penetration depth of the complex magneto-optic measurements. For these measurements we use magneto-optic vector magnetometry based on differential intensity between two polarization states.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
O. Zivotsky, K. Postava, L. Kraus, K. Hrabovska, and J. Pistora "Depth sensitivity of magneto-optic Kerr effect on FeNbB amorphous ribbons", Proc. SPIE 6585, Optical Sensing Technology and Applications, 65851P (16 May 2007); https://doi.org/10.1117/12.722790
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