Ionic-liquid gating controls anomalous hall resistivity of Co/Pt perpendicular magnetic anisotropy films

We investigate anomalous Hall resistivity in ionic-liquid-gating of a [Co(0.8 nm)/Pt(0.6 nm)]₃ perpendicular magnetic anisotropy heterostructure mediated by a low voltage at various temperatures. An anomalous Hall resistivity changes by 13.02% is achieved under a low gating voltage of −4 V applied to the ionic liquid at room temperature. By fitting the curves of anomalous Hall resistivity vs. longitudinal resistivity at corresponding temperatures under different low voltages, we attribute the origin of the anomalous Hall effect in this system to skew scattering. This result paves the way for application to sensitive low-voltage-induced reversible magnetoelectric coupling in spintronic devices.