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Proceedings Paper

Depth sensitivity of magneto-optic Kerr effect on FeNbB amorphous ribbons
Author(s): O. Zivotsky; K. Postava; L. Kraus; K. Hrabovska; J. Pistora
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Paper 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.

Paper Details

Date Published: 16 May 2007
PDF: 8 pages
Proc. SPIE 6585, Optical Sensing Technology and Applications, 65851P (16 May 2007); doi: 10.1117/12.722790
Show Author Affiliations
O. Zivotsky, Technical University of Ostrava (Czech Republic)
K. Postava, Technical University of Ostrava (Czech Republic)
L. Kraus, Institute of Physics (Czech Republic)
K. Hrabovska, Technical University of Ostrava (Czech Republic)
J. Pistora, Technical University of Ostrava (Czech Republic)

Published in SPIE Proceedings Vol. 6585:
Optical Sensing Technology and Applications
Francesco Baldini; Jiri Homola; Robert A. Lieberman; Miroslav Miler, Editor(s)

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