External influence on magnetic properties of Fe-based nanocrystalline alloys |
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| Authors: | Jozef Sitek Jarmila Degmová Katarína Sedla?ková Pavol Butvin |
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| Institution: | 1. Department of Nuclear Physics and Technology, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovi?ova 3, 812 19 Bratislava, Slovakia;2. Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 845 11 Bratislava, Slovakia |
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| Abstract: | Amorphous and nanocrystalline ribbons of NANOPERM, FINEMET and HITPERM were studied by Mössbauer spectroscopy (MS) after the influence of external factors: different annealing atmospheres, tensile stress and several kinds of corrosion. MS is a suitable tool for such studies because the spectral parameters are very sensitive to changes in the vicinity of the probe — 57Fe nuclei. The most sensitive parameters were hyperfine magnetic field in crystalline component, average hyperfine field in amorphous component and direction of net magnetic moments. Influence of external factors modified also the structure of the alloys, i.e. new or modified phases were identified by MS phase analysis. |
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| Keywords: | 61 18 Fs 61 46 +w 76 80 +y 75 50 Kj |
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