c-AFM on CFO-BFO. (a) Contact mode c-AFM topography of CFO-BFO. (b) c-AFM of CFO-BFO at 100 mV tip bias. (c) Schematic of the CFO-BFO nanocomposite sample and experimental setup. (d) FORC-IV average current for all pixels at 87% humidity; the inset shows FORC-IV bias waveform (blue) and current response (green) for the 87% humidity case.