Abstract
Two sets of Fe52ixCoxPt28B20 (x = 0‐26 at.%) and Fe60ixCoxPt25B15 (x = 0‐40 at.%) alloys were prepared in the form of ribbons by the rapid quenching technique. Structure of the samples was characterized by Mossbauer spectroscopy and X-ray diraction. In the as-quenched alloys the amorphous phase coexisted with the fcc-(Fe,Co)Pt disordered solid solution. Dierential 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.
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