Enhancing magnetoimpedance response by anisotropic surface-charge accumulation

Magnetoimpedance (MI) elements show potential application in detection devices as well as advanced electronic components such as neuro-morphing computing and magneto-ionics. We demonstrate surface -charge accumulation via the transformative impact of near -field electrospinning on MI response of Co -based ribbons via longitudinal or transverse formation of aligned TiO2/PVA/CTAB composite fibers. MI represents sensitivity changes against anisotropic charge accumulation designed at the surface via longitudinally or transversely grown fibers. Notably, MI for the longitudinal electrospun exhibits a unique single -peak pattern, in contrast to the conventional dual -peak behavior. This variation is attributed to the meticulous alignment of fibers along the length and width of the ribbons, triggering a dynamic interplay at the crucial ferroelectric/ferromagnetic interface. Our finding demonstrates MI response control through interacting with anisotropic-order of surface -charge mediated by composite fibers.