Abstract

We have investigated the electromotive force of the spin Seebeck effect and anomalous Nernst effect as a function of Ni film thickness. As Ni film becomes thinner, the electromotive force becomes larger. We also confirmed that the electromotive force of Ni/Ce:YIG samples is higher than that of Pt/Ce:YIG. On the other hand, it is reported that the anomalous Nernst effect of Fe is enhanced by Al addition. However, the effect of Al addition to Ni has not yet been reported. Therefore, we have investigated the anomalous Nernst effect of Ni–Al alloys. As a result, it was found that the appropriate annealing temperature is over 900 °C and the electromotive force is highest with the composition of Ni0.7Al0.3.

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