Structural Investigation of Rapidly Quenched FeCoPtB Alloys
A. Grabiasa, J. Latuchb, D. Oleszakb and M. Kopcewicza
aInstitute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland
bFaculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland
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Two sets of Fe52-xCoxPt28B20 (x=0-26 at.%) and Fe60-xCoxPt25B15 (x=0-40 at.%) alloys were prepared in the form: of ribbons by the rapid quenching technique. Structure of the samples was characterized by Mössbauer spectroscopy and X-ray diffraction. In the as-quenched alloys the amorphous phase coexisted with the fcc-(Fe,Co)Pt disordered solid solution. Differential scanning calorimetry measurements performed in the range 50-720 °C revealed one or two exothermal peaks. The magnetically hard ordered L10 (Fe,Co)Pt and magnetically soft (Fe,Co)2B nanocrystalline phases were formed due to thermal treatment of the alloys. The influence of Co content on the structure of the as-quenched and heated alloys was studied.
DOI: 10.12693/APhysPolA.119.68
PACS numbers: 75.50.Bb, 75.50.Kj, 76.80.+y