Measurement setup for Nernst and Seebeck effect at high temperatures and magnetic fields tested on elemental bismuth and full-Heusler compounds

M Parzer; T Schmid; F Garmroudi; A Riss; T Mori; E Bauer

doi:10.1063/5.0195486

Measurement setup for Nernst and Seebeck effect at high temperatures and magnetic fields tested on elemental bismuth and full-Heusler compounds

Rev Sci Instrum. 2024 Apr 1;95(4):043906. doi: 10.1063/5.0195486.

Authors

M Parzer¹, T Schmid¹, F Garmroudi¹, A Riss¹, T Mori^{2

3}, E Bauer¹

Affiliations

¹ Institute of Solid State Physics, Technische Universität Wien, 1040 Vienna, Austria.
² International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan.
³ Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Japan.

PMID: 38651989
DOI: 10.1063/5.0195486

Abstract

In this work, a measurement setup to study the Seebeck and Nernst effect at high temperatures and high magnetic fields is introduced and discussed. The measurement system allows for simultaneous measurements of both thermoelectric effects up to 700 K and magnetic fields up to 12 T. Based on theoretical concepts, measurement equations are derived that counteract constant spurious offset voltages and, therefore, inhibit systematic errors in the measurement setup. The functionality is demonstrated on polycrystalline samples of elemental bismuth as well as various full-Heusler materials, exhibiting an anomalous Nernst effect. In all samples, the measured Seebeck and Nernst coefficients align excellently with the reported values. This allows future research to substantially extend the measured temperature and field intervals, commonly limited to temperatures below room temperature. For the first time, the thermoelectric and thermomagnetic properties of these materials are reported up to temperatures of 560 K.