Investigating the off-diagonal components of the conductivity and thermoelectric tensor of materials hosting complex antiferromagnetic structures has become a viable method to reveal the effects of topology and chirality on the electronic transport in these systems. In this respect, Mn5Si3 is an interesting metallic compound that exhibits several antiferromagnetic phases below 100 K with different collinear and noncollinear arrangements of Mn magnetic moments. Previous investigations have shown that the transitions between the various phases give rise to large changes of the anomalous Hall effect. Here, we report measurements of the anomalous Nernst effect of Mn5Si3 single crystals. Below 25 K we observe a sign change of the zero-field Nernst signal with a concomitant decrease of the Hall signal and a gradual reduction of the remanent magnetization which we attribute to a subtle rearrangement of the magnetic moment configuration at low temperatures.
@article{arxiv.2405.03438,
title = {Anomalous Nernst effect in the noncollinear antiferromagnet Mn$_5$Si$_3$},
author = {Christoph Sürgers and Gerda Fischer and Warlley H. Campos and Anna Birk Hellenes and Libor Šmejkal and Jairo Sinova and Michael Merz and Thomas Wolf and Wolfgang Wernsdorfer},
journal= {arXiv preprint arXiv:2405.03438},
year = {2025}
}