Fig. 1: Scheme of the synthesis route and characterization of bilayer core-shell NiFe2O4@BiFeO3@ polypyrrole (NFO@BFO@PPy) nanoparticles (NPs).
From: Interface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss
a Scheme of the synthesis route of NFO@BFO@PPy NPs and the mechanism of dual-pinning effect. The inset images were obtained by transmission electron microscopy (TEM). Scale bars are as follows: 20 nm (NFO), 20 nm (NFO@BFO), 100 nm (NFO@BFO@PPy). The red box in the interface inset represents the uncompensated antiferromagnetic (AFM) spins formed at the ferromagnetic (FM) and AFM interface. The blue circle in the inset indicates the hindering effect of the surface electric field generated in the BFO on the dipole deflection in the PPy. b XRD plot of NFO, NFO@BFO, and NFO@BFO@PPy. c FTIR plot of NFO@BFO@PPy and PPy. d STEM of NFO@BFO@PPy. e the EDX elemental mapping images of NFO@BFO NPs. Source data are provided as a Source Data file.
