Electrospun Dy-doped SrFe12O19 nanofibers: microstructure and magnetic properties

SrDyxFe12−xO19 (x ≤ 0.08) nanofibers have been synthesized by the electrospinning method followed by calcinations process. The partial substitution of rare earth ions Dy3+ (10.5 μB of magnetic moments) mainly occupying 12k sublattice sites in the SrFe12O19 crystal structure is investigated and discussed in this work. An enhanced coercivity of 7155 Oe has been obtained when the doped content reached to 0.08 at a relative low calcination temperature of 800 °C. As a result, we believe the synthesized SrDyxFe12−xO19 nanofibers can potentially be useful in high-density recording media as well as permanent magnets.