Phys.org   October 30, 2023 Transition-metal oxides (TMOs) with strong ferrimagnetism provide new platforms for tailoring the anomalous Hall effect (AHE) beyond conventional concepts based on ferromagnets, and particularly TMOs with perpendicular magnetic anisotropy (PMA) are of prime importance for today’s spintronics. In this study researchers in Germany reported on transport phenomena and magnetic characteristics of the ferrimagnetic TMO NiCo2O4 (NCO) exhibiting PMA. The entire electrical and magnetic properties of NCO films were strongly correlated with their conductivities governed by the cation valence states. The AHE exhibited an unusual sign reversal resulting from a competition between intrinsic and extrinsic mechanisms depending […]