Enhanced saturation magnetization of Fe3Si nanodot-embedded Fe80Si17Nb3 flexible film for efficient wireless power transfer

• The saturation magnetization is effective enhancement in the presence of Fe3Si nanodot buried in the Fe80Si17Nb3.
• A saturation magnetization of 244 emu g−1 is proposed for high-efficiency wireless power transfer.
• The return loss of the antenna will be tuned to match the designed frequency.
• Such a wireless power transfer can be enhanced efficiency up to 97.3%.

An efficient magnetically coupled resonance response is performed using an iron silicide-based nanostructured magnetoelectric material with high saturation magnetization for the wireless charging of battery-powered consumer electronics. With 500 °C annealing, the self-assembled Fe3Si nanodots buried in the Fe80Si17Nb3 host matrix with (220) lattice spacing of 1.99 Å corresponding to a volume density of 8.96 × 1016 cm3, can be obtained and a maximum saturation magnetization of 244 emu g−1 achieved. The return loss of the antenna will be tuned to match the designed frequency with greater attenuated intensity (−0.39 dB) and a relatively narrow bandwidth (6 kHz) when the Fe3Si nanodot-embedded Fe80Si17Nb3 sample is placed in a WiTricity system. An efficient wireless power transfer can be created and improved from 47.5% to 97.3%. The associated coil and loop antenna resonators are significantly readjusted to match the power transfer by putting this nanostructured magnetoelectric material in a WiTricity system.