Anomalous Nernst effect in the noncollinear antiferromagnet Mn\(_5\)Si\(_3\)

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, Mn\(_5\)Si\(_3\)...

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Bibliographic Details
Published in:arXiv.org 2024-05
Main Authors: Sürgers, Christoph, Fischer, Gerda, Campos, Warlley H, Anna Birk Hellenes, Šmejkal, Libor, Sinova, Jairo, Merz, Michael, Wolf, Thomas, Wernsdorfer, Wolfgang
Format: Article
Language:English
Subjects:
Antiferromagnetism
Electron transport
Hall effect
Low temperature
Magnetic moments
Metal compounds
Nernst-Ettingshausen effect
Single crystals
Tensors
Thermoelectric materials
Topology
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Summary: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, Mn\(_5\)Si\(_3\) 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 Mn\(_5\)Si\(_3\) 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.
ISSN:2331-8422