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Conversion electron Mössbauer spectroscopy of the surface crystallization of the Fe75Co9B16 amorphous alloy

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Abstract

Using a new design of helium-methane gas-flow detector of conversion electrons for Mössbauer spectroscopy, non-uniform nucleation of the primary α-Fe-Co phase on both contact and free surfaces of the Ar(+H2) annealed amorphous Fe75Co9B16 alloy was observed in its early crystallization stage. In this state the amount of crystalline phase on the contact ribbon side surpasses that on the free one by a factor of three, whereas no traces of volume crystallization were observed in the transmission spectra. By applying ion implantation to both ribbon surfaces, a slight reduction of the crystalline phase contribution was found. Magnetic domain structure observations were performed in order to evaluate the influence of surface crystallization on magnetic properties.

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Author notes

  1. I. Škorvánek

    Present address: GKSS Forschungszentrum, Max-Planck-Strasse, D-2054, Geesthacht, Germany

Authors and Affiliations

  1. Institute of Physical Metallurgy, Czechoslovak Academy of Sciences, Žižkova 22, CS 616 62, Brno, Czechoslovakia

    T. Zemčík

  2. Institute of Physics, Czechoslovak Academy of Sciences, Na Slovance 2, CS 180 40, Prague, Czechoslovakia

    K. Závěta

  3. Institute of Experimental Physics, Slovak Academy of Sciences, Solovjevova 47, CS 043 53, Košice, Czechoslovakia

    I. Škorvánek

Authors
  1. T. Zemčík
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  2. K. Závěta
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  3. I. Škorvánek
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Zemčík, T., Závěta, K. & Škorvánek, I. Conversion electron Mössbauer spectroscopy of the surface crystallization of the Fe75Co9B16 amorphous alloy. J Mater Sci 28, 654–658 (1993). https://doi.org/10.1007/BF01151241

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  • DOI: https://doi.org/10.1007/BF01151241

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