Microstructure and Magnetic Properties of Nanocrystalline Fe 93-x-y Z r7 B ,x Cu y Alloys

An unconventional technique combining Mossbauer spectroscopy with the effects induced by magnetic radio-frequency fields (if collapse and if sidebands) is employed to study the microstructure and magnetic properties of nanocrystalline clusters of bcc Fe formed by annealing amorphous Fe 93-x-y Z r7 B ,x Cu y (x=6, 8, 12, y=0, 2) alloys at 500-600°C. The rf-Mossbauer experiments allow us to distinguish magnetically soft nanoclusters from magnetically harder microcrystalline phases. The dependence of the bcc Fe phase formation on the alloy composition is discussed. The Mossbauer results are supplemented by DSC measurements.