Observation of enhanced thermopower due to spin fluctuation in weak itinerant ferromagnet.

ABSTRACT: Increasing demand for higher energy efficiency calls for waste heat recovery technology. Thus, facilitating practical thermoelectric generation systems is strongly desired. One option is enhancing the thermoelectric power factor, S ²/r, where S is the Seebeck coefficient and r is the electrical resistivity, although it is still challenging because of the trade-off between S and r. We demonstrate that enhanced S ²/r can be achieved by incorporating magnetic interaction in ferromagnetic metals via the spin fluctuation arising from itinerant electrons. We show that electron-doped Heusler alloys exhibit weak ferromagnetism at T _C near room temperature with a small magnetic moment. A pronounced enhan

SUBMITTER: Tsujii N 

PROVIDER: S-EPMC6386555 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature