Impact of NiTb x Fe 2− X O 4 nanofiller in PVDF matrix for the characterization of magnetic, dielectric properties and effectiveness of EMI shielding

This paper reports the influence of the inclusion of terbium-doped nickel ferrite [NiTb x Fe 2− x O 4 ( x = 0.1, 0.2, 0.3)] nanofiller in polyvinylidene fluoride (PVDF) matrix for modification of the dielectric and magnetic properties of polymer nanocomposite. The dielectric spectroscopic analysis reveals a significant improvement in permittivity for a certain filler ( x = 0.3) content in the PVDF matrix. The magnetization (M–H) and FC-ZFC studies show a decrement in blocking ( T b ) temperature with high filler loading. Hard ferrimagnetic characteristics predominate over soft ferromagnetic properties at high filler concentrations. The higher saturation magnetization, high retentivity, high coercively and a wider hysteresis loop area are seen in the low-temperature regions. The lower skin depth and better shielding effectiveness give a great platform to the films for the fabrication of electromagnetic shielding (EMI) devices in the high-frequency domain. The light weight of Tb-NFO-PVDF nanocomposite film poses superior advantages against traditional EMI shielding material. Graphical abstract TOC: Represents magnetization plot, ZC & ZFC change with temperature (Inset) and skin depth with frequency plot (Inset).