ACTA

Influence of Si Content on the Surface Magnetic Properties of Fe₈₀Si_xB_{20 - x} Metallic Glasses (x = 6, 10)

O. Životský^a, Y. Jirásková^b, E. De Grave^c, K. Hrabovská^a, A. Hendrych^a and L. Klimša^a
^aInstitute of Physics, Technical University of Ostrava, 17. listopadu 15, CZ-708 33 Ostrava, Czech Republic
^bInstitute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, CZ-616 62 Brno, Czech Republic
^cGhent University, Dept. of Physics and Astronomy, Div. Nuclear Material Physics, Proeftuinstraat 86, B-9000 Gent, Belgium

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The surface sensitive magneto-optical Kerr effect methods and conversion: as well as integral low-energy electron Mössbauer spectroscopy are used to compare the surface magnetic and microstructural properties of two Metglas alloys with compositions Fe₈₀Si₆B₁₄ and Fe₈₀Si₁₀B₁₀. It is shown that the samples differ markedly both in the Mössbauer spectra and the surface hysteresis loops. While the ribbon with lower amount of Si is amorphous and characterized by three contributions corresponding to clusters with prevailing content of Fe and Si atoms, to clusters of mainly Fe and B atoms, and regions in between, the surface of the second sample is partially crystallized into bcc-FeSi crystals embedded in the residual amorphous matrix.

DOI: 10.12693/APhysPolA.118.751
PACS numbers: 75.50.Bb, 75.50.Kj, 75.70.Kw, 76.80.+y