Abstract
The promising high magnetocrystalline anisotropy of about K1>0.4MJ/m3 has been derived for (Fe,Co)2–3B melt-spun ribbons leading to a potential candidate for novel hard magnetic applications. We present the microstructural and magnetic analysis of the phase relations in various microcrystalline alloys with a nominal composition of (Fe1−xCox)71B29 (0⩽x⩽1) by means of SEM and TEM investigations. The melt-spun ribbons were prepared at different wheel speeds (18–38m/s) and annealed at 500°C for one hour. The optimum hard magnetic properties were obtained for (Fe0.7Co0.3)71B29 at 26.7m/s. The crystal anisotropy and saturation polarisation have been confirmed by DFT calculations.
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