Fig. 3: Schematic and experimental proof of the dielectric pinning mechanism.
From: Interface-induced dual-pinning mechanism enhances low-frequency electromagnetic wave loss
a Schematic diagram of the dielectric pinning mechanism. The yellow shading in the inset indicates that no internal bias electric field is generated, and the red and blue shading represent the positive and negative poles of the internal bias electric field. Benefiting from the core-shell structure of NFO@BFO, the deformation due to magnetostriction of the NFO is transferred to the BFO shell layer, causing it to generate a built-in internal electric field, which acts as a hindrance to the deflection of the dipole in the PPy. b Phase response of a single core-shell NP obtained with and without magnetic field. c the corresponding amplitude response. COMSOL simulations of NFO@BFO NPs under a magnetic field of 3.0 mT show d the magnetization norm. e the strain generated on the BFO shell due to the magnetostrictive effect of NFO core and von Mises stress. f the volumetric strain distribution, and g the corresponding electric potential induced on the surface of the BFO shell. The legend units are as follows: d Oersted (Oe), e 103 Pa, f 10−8, and g 10−4 V. Source data are provided as a Source Data file.
