Magnetic Hyperfine Fields of Nanoperm Alloys

Magnetic hyperne elds of Fe90Zr7B3 Nanoperm nanocrystalline alloy are characterized by 57 Fe Mössbauer spectrometry and 57 Fe NMR as well as by magnetic force microscopy. 57Fe NMR enables to distinguish a broad signal of iron atoms located in a residual amorphous matrix from a narrow one which belongs to Fe in nanograins.The former coincides with the distribution of hyperne elds obtained from 57 Fe Mössbauer spectroscopy.In addition, it is possible to make a distinction between NMR signals of the Fe nanograins located in magnetic domains from that of the nanograins positioned in domain walls.This is conrmed by magnetic force microscopy where appearance of maze-domains is observed.