Electrospining and physical properties of nanofiber polymer-inorganic planar quantum layers, hybridized with 0-D Fe2O3

Nanofiber based polymer-inorganic composites filled with superparamagnetic nanoparticles were synthesized via electrospinning technique from the suspension of γ-Fe
2
O
3
nanoparticles in dimethylformamide solution of poly(vinylpyrrolidone) (PVP). On the basis of the magnetometric analysis, it was shown that γ-Fe
2
O
3
nanoparticles were in a superparamagnetic state in the nonmagnetic PVP matrix and its content was 10% weight. TEM, EDX analysis and impedance spectroscopy were conducted. It was found that the applied magnetic field (MF) of 2.75 kOe caused a negative giant magnetoresistive effect (GMRE) in the infra-frequency range. For both under normal conditions, and in MF nanofiber (NFM) composite, filled with functionalized maghemite γ-Fe
2
O
3
nanoparticles, NFM/γ-Fe
2
O
3
, the phenomenon of “negative” capacity was detected In addition, the polarization properties of the synthesized material were analyzed. It was proved that applied MF during the measurements increased the dielectric constant ∊ of the material and the magneto-capacitive effect reached 4000% in the infra-frequency range at room temperature. Spin electromotive force (EMF) and 〈spin-battery〉 effect were detected. The possibility of using the synthesized material as high-quality magneto varicaps (in the frequency range of 50÷10
⁶
Hz) and quantum batteries (in the frequency range 10
⁻³
÷210
⁻²
Hz) was proved.