Temperature dependent anomalous Hall effect and anomalous Nernst effect in perpendicularly magnetized [CoSiB/Pt] multilayer film

Highlights: • Anomalous Hall and anomalous Nernst effects are measured in [CoSiB/Pt] films. • Temperature dependences of the two effects show clear distinction. • Sharp decrease of Nernst effect can be understood from Mott relation. We report experiments on the temperature dependence of anomalous Hall and anomalous Nernst effects in amorphous [CoSiB/Pt] multilayer films with perpendicular magnetic anisotropy down to low temperatures. The Hall resistance decreases slowly with decrease in temperature, remaining at about 88% of the room temperature value at 25 K. On the other hand, the Nernst coefficient decreases rapidly with decreasing temperature and becomes about 10% of the room temperature value even at 100 K. The coercive field determined from these measurements also shows a strong change with temperature, increasing by a factor of two at 25 K as compared with that at room temperature.