Development of novel thermoelectric materials containing magnetic elements
Takao MORI1, Naohito TSUJII1
Discovering enhancement principles to overcome the paradoxes in the property requirements of thermoelectric materials are imperative for their wide-scale implementation of energy-harvesting for IoT devices, etc. Nanostructuring methodologies to achieve phonon-selective-scattering is becoming quite advanced. Band-structuring methods to overcome the Seebeck coefficient and the electrical conductivity tradeoff cannot always be readily implemented. We propose that utilizing magnetic semiconductors and the introduction of magnetic ions, can be a powerful way to enhance the power factor. Since this depends on mechanisms like magnetic interactions and spin fluctuations, which are not solely dependent on the magnetic ordering like magnon-derived effects, this is a robust enhancement method which can also be effective at relatively high temperatures.
- 1 National Institute for Materials Science (NIMS)