Fabrication of multiferroic Ba0.7Sr0.3TiO3–Ni0.8Zn0.2Fe2O4 composite nanofibers by electrospinning

The multiferroic Ba0.7Sr0.3TiO3 (BSTO)–Ni0.8Zn0.2Fe2O4 (NZFO) nanofibers with different molar ratios were prepared by electrospinning method. After annealing at 700 °C, the composite nanofibers showed highly crystalline structure with no impurity phase. The fibers before and after heat treatment had high aspect ratios, and the fibrous morphology could be observed obviously. The maximum value of magnetic coercivity was obtained corresponding to the BSTO–NZFO nanofibers with molar ratio of 80/20. The values of coercivity, saturation magnetization and retentivity for the BSTO–NZFO (molar ratio=80/20) nanofibers were 44.873 Oe, 2.479 emu/g and 0.189 emu/g, respectively. Moreover, the magnetodielectric, dielectric and ferroelectric properties were measured at room temperature.

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► Multiferroic Ba0.7Sr0.3TiO3–Ni0.8Zn0.2Fe2O4 nanofibers were synthesized.
► Nanofibers showed highly crystalline structure with no impurity phase.·
► The fibers before and after heat treatment had high aspect ratios.·
► The maximum value of magnetic coercivity was 44.873 Oe.·
► The magnetodielectric, dielectric and ferroelectric properties were displayed.