MAGNETIC HYPERFINE PROPERTIES IN FEZRB-TYPE NANOCRYSTALLINE METALLIC ALLOYS

Transmission Mossbauer spectra were performed on FeZrB nanocrystalline alloys with high crystalline fraction (approximate to 60%) at tempera tures comprised within the range 77-600 K. We report the temperature d ependencies of the magnetic hyperfine data of the three contributions: the crystalline bcc-Fe grains, the residual amorphous phase, and the interface intermediate between the bulk of crystalline and amorphous p hases. The evolution of the average value of the hyperfine field chara cteristic of the residual amorphous phase is discussed in terms of int eractions between crystalline grains transmitting through the intergra nular phase.