Magnetic hard/soft nanocomposite ferrite aligned hollow microfibers and remanence enhancement

The nanocomposite SrFe12O19/Ni0.5Zn0.5Fe2O4 ferrite aligned hollow microfibers with the hollow diameter to the fiber diameter estimated about 3/5 have been prepared by the gel precursor transformation process. The nanocomposite binary ferrites with different mass ratios are formed after the precursor calcined at 900 °C for 2 h, fabricating from SrFe12O19 nanoparticles and Ni0.5Zn0.5Fe2O4 nanoparticles with a uniform phase distribution. These nanocomposite ferrite microfibers show a combination of magnetic characteristics for the hard (SrFe12O19) and soft (Ni0.5Zn0.5Fe2O4) phase with an enhanced remanence owing to the exchange-coupling interactions. The aligned microfibers exhibit a shape anisotropy.

Nanocomposite ferrite hollow microfibers are generally aligned and show a well exchange-coupling of hard phase (SrFe12O19) and soft phase (Ni0.5Zn0.5Fe2O4), combining a high Ms of Ni0.5Zn0.5Fe2O4 and Hc of SrFe12O19.Figure optionsDownload high-quality image (77 K)Download as PowerPoint slideResearch highlights
► The nanocomposite ferrite aligned hollow microfibers have been prepared.
► The structure of nanocomposite ferrite aligned hollow microfibers was characterized.
► The nanocomposite ferrite hollow microfibers show enhanced magnetic properties.