Strain effects on the magnetotransport properties of transition metals

The Anomalous Hall Effect (AHE) is a phenomenon which consists of an extra anomalous transverse voltage developing when current is passed through ferromagnetic material in a magnetic field. In this work, we studied the dependence of strain and magnetization effect on the intrinsic anomalous Hall conductivity (AHC) in 3d metal Fe-bcc, Co-fcc, Co-hcp, and FeCo structure. For the Fe-bcc case, the AHC shows a slightly decreasing with the increase of pressure, being this associate to the magnetization dependence with the lattice constant. However, the AHC for lattices constants above 2.95A shows a downturn around 70%, even when the magnetization has increased. This decreasing seems to be related to a transition of d-states occupations above this lattice constant. The computation of the anomalous Hall conductivity was carried out using ab-initio calculations (included the effect of spin-orbit interaction for the ferromagnetic state) and the Wannier interpolation technique for the application of the Kubo-Greenwood formula.