Strong enhancement of anomalous Nernst effect in Fe by Ga substitution and its application for heat flux sensor

摘要

The anomalous Nernst effect (ANE) is representative magneto-thermoelectric phenomena in conductive ferromagnets. The ANE generates an electromotive force in the direction along the outer product of an applied temperature gradient and spontaneous magnetization in magnetic materials. Recently, the ANE has been studied in various materials to clarify its microscopic mechanism and to investigate its potential as thermoelectric generators and/or heat-current sensors. Previous work demonstrates that the thermoelectric voltage through the ANE is dramatically enhanced by utilizing the simple lateral thermopile structures . Furthermore, it is possible to develop the flexible and wearable thermoelectric conversion devices by utilizing the ANE . However, it is still necessary to explore the materials showing larger efficiency of thermoelectric conversion.