Evolution of anomalous Hall behavior in thin Pt/Co/Pt trilayers

• Our work confirmed that the new scaling of anomalous Hall effect is reasonable.
• The applicable scope of the conventional scaling is demonstrated by a 3D R map.
• Competing scattering mechanisms can induce shape evolution of Hall angle curves.

In this work, through controlling spin scattering mechanisms, anomalous Hall behaviors exhibit a series of evolutions in thin Pt/Co/Pt trilayers. The shape of Hall resistivity over longitudinal resistivity (ρAH/ρxxρAH/ρxx versus ρxx) curve turns from bending to linear and then bending again in most trilayers. This kind of evolution cannot be explained by the conventional linear scaling of anomalous Hall effect. It should be ascribed to the contribution of spin-phonon skew scattering. Our research may help to understand spin scattering behavior in low-dimensional systems more deeply and build a proper synergy between theory and experiment on the research of anomalous Hall effect.