Abstract
Nanocrystalline Fe80Zr7B12Cu1 alloys with different amounts and sizes of bcc precipitates were prepared by appropriate annealing of amorphous ribbons. The 6–10 nm ferromagnetic bcc granules are embedded in a residual amorphous tissue with a thickness at least 4 nm. Above room temperature superparamagnetic relaxation characteristic for small magnetic particles was observed with increasing temperature, as indicated by a significant increase in the width of the Mössbauer lines belonging to the bcc precipitates. It shows the absence of magnetic coupling which is stronger than the dipole-dipole interaction between the ferromagnetic nanoparticles.
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Kiss, L. F., Kemény, T., Vincze, I. and Franco, V., to be presented at SMM-15.
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Kaptás, D., Kiss, L.F., Balogh, J. et al. Superparamagnetic Relaxation in Nanocrystalline Fe80Zr7B12Cu1 Alloys. Hyperfine Interactions 141, 175–179 (2002). https://doi.org/10.1023/A:1021277214106
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DOI: https://doi.org/10.1023/A:1021277214106