Thermal Evolution of Hyperfine Fields in Fe-Zr-Si-B Nanocrystalline Alloy

Abstract

Mössbauer investigations of Fe₈₇Zr₇Si₄B₂ nanocrystal line material were performed over the temperature range 4.2-675 K. Three well resolved spectral components have been found and attributed to bcc-Fe grains (with almost pure iron structure), residual amorphous matrix enriched with solute elements and interfaces formed at the grain-matrix boundaries. Thermal evolution of magnetic hyperfine parameters for these different structural phases are presented and discussed.