Fig. 3. (a) Custom-built cell setup for liquid gating of the mesoporous Ni–Co oxide coating prepared on top of the Si/Ti/Au substrate. (b) Schematic representation of the mesoporous structure of the Ni–Co oxide layer, illustrating the charge arrangement for a negatively biased sample. (c) Room-temperature magnetic hysteresis loops for as-annealed (green), gated (orange) and recovered (blue) states; (d) and (e) are the corresponding MS and HC values measured at each state.
