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PreprintarXiv licencearXiv

Detecting a large magneto-optical shift in Py/NiO bilayers

  • Adrielson Dias
  • Maria Clara
  • Ozéas Rodrigues
  • Gabriel Henrique
  • José Lucas
  • José Holanda
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Abstract

Here, magneto-optical magnetometry measurements on Py/NiO bilayers reveal a pronounced magnetic-field-induced wavelength shift, demonstrating strong magneto-optical coupling in this antiferromagnetic system. A systematic and monotonic spectral shift of up to ~ 400 nm is observed as the applied magnetic field increases, saturating at higher fields. Quantitative analysis shows that the associated magneto-optical energy variation is on the order of 107 eV, comparable to the magnon energy scale in NiO. Owing to the large NiO thickness, the observed effect originates from magnons intrinsic to the antiferromagnetic NiO layer rather than from spin currents injected by the Py underlayer. These results provide direct experimental evidence for magnetic-field control of antiferromagnetic magnon energies via magneto-optical interactions, establishing Py/NiO bilayers as a promising platform for optically probing and manipulating antiferromagnetic spin dynamics.

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Cite

BibTeXRIS
BibTeX
@misc{dias2026detecting,
  title = {{Detecting a large magneto-optical shift in Py/NiO bilayers}},
  author = {Adrielson Dias and Maria Clara and Ozéas Rodrigues and Gabriel Henrique and José Lucas and José Holanda},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.27106},
  eprint = {2609.27106},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.27106},
}
RIS
TY  - UNPB
TI  - Detecting a large magneto-optical shift in Py/NiO bilayers
AU  - Adrielson Dias
AU  - Maria Clara
AU  - Ozéas Rodrigues
AU  - Gabriel Henrique
AU  - José Lucas
AU  - José Holanda
PY  - 2026
DA  - 2026/09/22
PB  - arXiv
DO  - 10.48550/arxiv.2609.27106
UR  - https://arxiv.org/abs/2609.27106
AB  - Here, magneto-optical magnetometry measurements on Py/NiO bilayers reveal a pronounced magnetic-field-induced wavelength shift, demonstrating strong magneto-optical coupling in this antiferromagnetic system. A systematic and monotonic spectral shift of up to ~ 400 nm is observed as the applied magnetic field increases, saturating at higher fields. Quantitative analysis shows that the associated magneto-optical energy variation is on the order of 107 eV, comparable to the magnon energy scale in NiO. Owing to the large NiO thickness, the observed effect originates from magnons intrinsic to the antiferromagnetic NiO layer rather than from spin currents injected by the Py underlayer. These results provide direct experimental evidence for magnetic-field control of antiferromagnetic magnon energies via magneto-optical interactions, establishing Py/NiO bilayers as a promising platform for optically probing and manipulating antiferromagnetic spin dynamics.
ER  -