The net entropy change corresponding to the charge carriers in a Ni-doped FeRh bulk polycrystal was experimentally evaluated in a single sample using low temperature heat capacity experiments with applied magnetic field, and using Seebeck effect and Hall coefficient measurements at high temperatures across the first order transition. From the heat capacity data a value for the electronic entropy change ΔSel≈8.9 J\ kg−1K−1 was extracted, whereas a value of up to 4 J\ kg−1K−1 was obtained form the Seebeck coefficient. Additionally, the analysis of the Seebeck coefficient allows tracing the evolution of the electronic entropy change with applied magnetic field. An increase of the electronic entropy with increasing applied magnetic field is evidenced, as high as 10 percent at 6 T.
@article{arxiv.1808.04183,
title = {Thermoelectric determination of electronic entropy change in Ni-doped FeRh},
author = {Nicolás Pérez and Alisa Chirkova and Konstantin P. Skokov and Thomas George Woodcock and Oliver Gutfleisch and Nikolai V. Baranov and Kornelius Nielsch and Gabi Schierning},
journal= {arXiv preprint arXiv:1808.04183},
year = {2018}
}