Surface properties of Fe76Mo8Cu1B15 alloy after annealing |
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| Authors: | M Miglierini T Kaňuch Y Jirásková M Mashlan R Zbořil M Vůjtek |
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| Institution: | (1) Department of Nuclear Physics and Technology, Slovak University of Technology, Ilkovičova 3, 812 19 Bratislava, Slovakia;(2) Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Žižkova 22, 616 62 Brno, Czech Republic;(3) Departments of Experimental Physics and Physical Chemistry, Palacky University, Svobody 26, 771 46 Olomouc, Czech Republic |
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| Abstract: | NANOPERM-type alloy Fe76Mo8Cu1B15 is investigated in amorphous and in partially crystallized state. Samples were prepared by 1 h isothermal annealing in vacuum at temperatures ranging from 330°C up to 700°C. Bulk and surface microstructural characteristics were studied using transmission and conversion electron Mössbauer effect techniques, respectively. Surface features were checked by the help of atomic force microscopy. Presence of nanocrystalline bcc-Fe phase was detected during the first crystallization stage. The crystallization process starts at 450°C and it is more pronounced in surface regions than in the bulk. With progressing crystallization, hyperfine parameters especially of the amorphous residual phase are altered. Distinctions in surface morphology are revealed between wheel and air side of the ribbon-shaped samples. |
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| Keywords: | M?ssbauer effect nanoscale materials magnetic properties of nanostructures |
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