Structure and Optical Properties of (Co41Fe39B20)x(SiO2)1−x Nanocomposites

  • V. S. Staschuk Taras Shevchenko National University of Kyiv, Faculty of Physics
  • V. G. Kravets Taras Shevchenko National University of Kyiv, Faculty of Physics
  • V. O. Lysiuk V.E. Lashkaryov Institute of Semiconductor Physics, Nat. Acad. of Sci. of Ukraine
  • O. P. Polyanska Taras Shevchenko National University of Kyiv, Faculty of Physics
  • V. V. Stukalenko Taras Shevchenko National University of Kyiv, Faculty of Physics
  • A. L. Yampolsky Taras Shevchenko National University of Kyiv, Faculty of Physics
Keywords: ferromagnetic alloys, ellipsometry, optical conductivity, interband transitions, percolation

Abstract

The ellipsometric parameters Δ and Ψ for amorphous ferromagnetic alloys in the dielectric matrix, (Co41Fe39B20)x(SiO2)1−x, have been measured in the spectral interval л = 0.24÷1.0 мm (ℎv = 1.24÷5.15 eV) at various x-values. On the basis of the data obtained, the spectral dependences of the optical conductivity, q(ℎv), in those nanocomposites are studied. The dimensions of ferromagnetic particles were varied from 2 to 10 nm. The surface structure of nanocomposites is researched, by using scanning atomic force microscopy. The optical properties of nanocomposites are found to depend not only on the metal phase content, but also on the properties of interface regions, which are significantly different at metal phase contents above and below the percolation threshold.

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Published
2018-12-13
How to Cite
Staschuk, V., Kravets, V., Lysiuk, V., Polyanska, O., Stukalenko, V., & Yampolsky, A. (2018). Structure and Optical Properties of (Co41Fe39B20)x(SiO2)1−x Nanocomposites. Ukrainian Journal of Physics, 62(8), 666. https://doi.org/10.15407/ujpe62.08.0666
Section
Optics, lasers, and quantum electronics