Fabrication of 1D-Nanofiber/Fe₂O₃ Composites with Tailored Magnetic Properties.

A novel flexible electrospun nanofiber/-Fe₂O₃ composite has been obtained from suspension of -Fe₂O₃ nanoparticles in polyvinylpyrolidone solution in dimethylformamide. The impedance spectroscopy of the synthesized nanofiber/-Fe₂O₃ composite was carried out. Negative magnetoresistance and giant magnetocapacitance effects, as well as phenomenon of a "negative capacitance" at room temperature were observed in magnetic field (2.