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

This article presents the development and validation of a custom-built measurement setup designed for simultaneous investigation of the Seebeck and Nernst thermoelectric effects at high temperatures (up to 700 K) and high magnetic fields (up to 12 T). The setup incorporates optimized measurement equations to eliminate spurious offset voltages, enhancing accuracy, and is demonstrated on polycrystalline samples including elemental bismuth and various full-Heusler compounds known for exhibiting anomalous Nernst effects. Experimental results show excellent agreement with existing literature data and reference measurements, extending reliable thermoelectric and thermomagnetic characterization to temperatures well above room temperature. The system's design includes a superconducting magnet, precise temperature control, and a specialized sample holder, enabling dynamic and accurate measurements that can be further expanded to assess resistivity and Hall coefficients.