Nonmonotonic anomalous Hall effect and anisotropic magnetoresistance in SrRuO₃/PbZr_0.52Ti_0.48O₃ heterostructures

We fabricate SrRuO₃/PbZr_0.52Ti_0.48O₃ heterostructures each with an in-plane tensile-strained SrRuO₃ layer and investigate the effect of an applied electric field on anomalous Hall effect. The four-fold symmetry of anisotropic magnetoresistance and the nonmonotonic variation of anomalous Hall resistivity are observed. By applying positive electric field or negative electric field, the intersecting hump-like feature is suppressed or enhanced, respectively. The sign and magnitude of the anomalous Hall conductivity can be effectively controlled with an electric field under a high magnetic field. The electric-field-modulated anomalous Hall effect is associated with the magnetization rotation in SrRuO₃. The experimental results are helpful in modulating the magnetization rotation in spintronic devices based on SrRuO₃ heterostructures.