Unifying Magnetic, Electrical, and Thermoelectric Responses in a Non-Collinear Antiferromagnet

Abstract

Non-collinear antiferromagnets offer unconventional routes for controlling magnetic, electrical, and thermoelectric responses through their complex spin configurations and interfacial symmetry. Here, we detect exceptional interfacial properties arising from a non-collinear antiferromagnet by demonstrating a robust and quantitatively consistent exchange-bias response in an IrMn₃/Py heterostructure. The system consists of a 10 nm IrMn₃ layer coupled to a 5 nm permalloy (Py) film. Longitudinal magneto-optical Kerr effect (MOKE), anisotropic magnetoresistance (AMR), and anomalous Nernst effect (ANE) measurements independently reveal the same unidirectional field shift of approximately 50 Oe, together with a consistent cosine angular dependence. The simultaneous observation of these signatures establishes a direct correspondence between the interfacial magnetic symmetry imposed by the non-collinear antiferromagnet and the responses of the adjacent ferromagnet. This symmetry is manifested consistently in magnetization reversal, charge transport, and thermally driven voltage generation, demonstrating that the exchange-bias imprint is not restricted to a single experimental observable. Our results reveal a coherent multifunctional response of IrMn₃/Py and extend the conventional understanding of exchange bias beyond collinear antiferromagnetic systems. More broadly, they demonstrate the potential of non-collinear antiferromagnets as platforms for coupling magnetic, electrical, and thermoelectric functionalities in spintronic and spin-caloritronic devices.

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BibTeX RIS

BibTeX

@misc{jose2026unifying,
  title = {{Unifying Magnetic, Electrical, and Thermoelectric Responses in a Non-Collinear Antiferromagnet}},
  author = {André José and Adrielson Dias and Carlos Eduardo and Giovanna Celly and Luiza Paffer and José Araújo and José Laurentino and Monalisa Cavalcante and José Holanda},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.33046},
  eprint = {2609.33046},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.33046},
}

RIS

TY  - UNPB
TI  - Unifying Magnetic, Electrical, and Thermoelectric Responses in a Non-Collinear Antiferromagnet
AU  - André José
AU  - Adrielson Dias
AU  - Carlos Eduardo
AU  - Giovanna Celly
AU  - Luiza Paffer
AU  - José Araújo
AU  - José Laurentino
AU  - Monalisa Cavalcante
AU  - José Holanda
PY  - 2026
DA  - 2026/09/27
PB  - arXiv
DO  - 10.48550/arxiv.2609.33046
UR  - https://arxiv.org/abs/2609.33046
AB  - Non-collinear antiferromagnets offer unconventional routes for controlling magnetic, electrical, and thermoelectric responses through their complex spin configurations and interfacial symmetry. Here, we detect exceptional interfacial properties arising from a non-collinear antiferromagnet by demonstrating a robust and quantitatively consistent exchange-bias response in an IrMn_3/Py heterostructure. The system consists of a 10 nm IrMn_3 layer coupled to a 5 nm permalloy (Py) film. Longitudinal magneto-optical Kerr effect (MOKE), anisotropic magnetoresistance (AMR), and anomalous Nernst effect (ANE) measurements independently reveal the same unidirectional field shift of approximately 50 Oe, together with a consistent cosine angular dependence. The simultaneous observation of these signatures establishes a direct correspondence between the interfacial magnetic symmetry imposed by the non-collinear antiferromagnet and the responses of the adjacent ferromagnet. This symmetry is manifested consistently in magnetization reversal, charge transport, and thermally driven voltage generation, demonstrating that the exchange-bias imprint is not restricted to a single experimental observable. Our results reveal a coherent multifunctional response of IrMn_3/Py and extend the conventional understanding of exchange bias beyond collinear antiferromagnetic systems. More broadly, they demonstrate the potential of non-collinear antiferromagnets as platforms for coupling magnetic, electrical, and thermoelectric functionalities in spintronic and spin-caloritronic devices.
ER  -

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