Figure 2
Schematic cross section of the device.
A polymer film containing an ionic liquid (ionic liquid film) was used to apply an electric field to the surface of the Pd layer, in which a magnetic moment was induced. By applying a gate voltage VG, a pair of electric double layers (EDL) was formed at the top and bottom interfaces of the ionic liquid film. The formation of the bottom EDL resulted in a change in the electron density at the surface of the Pd layer. Because of Thomas–Fermi screening, only the electron density at the uppermost Pd layer was expected to be modulated.
