Nanocrystallization of the Amorphous Fe14Ni40Zr7B12 Alloys Studied by the M÷ssbauer Spectroscopy
M. Kopcewicza, B. Idzikowskib and J. Kalinowskaa
aInstitute of Electronic Materials Technology, Wˇlczy˝ska 133, 01-919 Warszawa, Poland
bInstitute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Pozna˝, Poland
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Formation of the soft magnetic nanostructure in amorphous Fe41Ni40Zr7B12 alloy due to heat treatment is studied by the M÷ssbauer, differential scanning calorimetry, and X-ray diffraction techniques. Annealing at temperatures 520 -580C leads to the formation of extremely soft nanocrystalline alloy as revealed by the rf-M÷ssbauer measurements. The superparamagnetic behaviour was observed for the alloy annealed at 620-640C. At higher annealing temperatures good soft magnetic properties deteriorate.
DOI: 10.12693/APhysPolA.102.301
PACS numbers: 76.80.+y, 75.50.Kj, 75.50.Bb, 81.40.--z