The observation of a sizable anomalous Hall effect in magnetic materials with vanishing magnetization has renewed interest in understanding and engineering this phenomenon. Antiferromagnetic antiperovskites are one of emerging material classes that exhibit a variety of interesting properties owing to a complex electronic band structure and magnetic ordering. Reports on the anomalous Nernst effect and its magnitude in this class of materials are, however, very limited. This scarcity may be partly due to the experimental difficulty of reliably quantifying the anomalous Nernst coefficient. Here, we report experiments on the anomalous Nernst effect in antiferromagnetic antiperovskite Mn3NiN thin films. Measurement of both the anomalous Hall and Nernst effects using the same sample and measurement geometry makes it possible to directly compare these two effects and quantify the anomalous Nernst coefficient and conductivity in Mn3NiN. We carefully evaluate the spatial distribution of the thermal gradient in the sample and use finite element modeling to corroborate our experimental results.
@article{arxiv.2212.02129,
title = {Anomalous Nernst effect in Mn$_3$NiN thin films},
author = {Sebastian Beckert and João Godinho and Freya Johnson and Jozef Kimák and Eva Schmoranzerová and Jan Zemen and Zbyněk Šobáň and Kamil Olejník and Jakub Železný and Joerg Wunderlich and Petr Němec and Dominik Kriegner and Andy Thomas and Sebastian T. B. Goennenwein and Lesley F Cohen and Helena Reichlová},
journal= {arXiv preprint arXiv:2212.02129},
year = {2023}
}