High-temperature dependence of anomalous Ettingshausen effect in SmCo${}_5$-type permanent magnets

Abstract

The anomalous Ettingshausen effect (AEE) in SmCo${}_5$-type permanent magnets has been investigated in the high-temperature range from room temperature to around 600 K. The anomalous Ettingshausen coefficient of the SmCo${}_5$ and (SmGd)Co${}_5$ magnets monotonically increases with increasing the temperature and shows the similar temperature dependence, while the coefficient of SmCo${}_5$ is slightly larger than that of (SmGd)Co${}_5$ at high temperatures. The dimensionless figure of merit for AEE in SmCo${}_5$ at high temperatures is much greater than the previous record obtained for the anomalous Nernst effect. The observed high-temperature behavior of AEE is discussed based on the first-principles calculations of transverse transport coefficients.

arXiv comment10 pages, 4 figures

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