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THz spontaneous magnon fluctuations and room-temperature spin switching in the orthoferrite Sm0.7Er0.3FeO3

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2023

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https://doi.org/10.1109/irmmw-thz57677.2023.10299332
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2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, NJ: IEEE, 2023. ISBN 979-8-3503-3660-3. Available under: doi: 10.1109/irmmw-thz57677.2023.10299332

Zusammenfassung

Ultrafast dynamics of correlated spins in the picosecond to femtosecond timescales have so far been pursued mainly with pump-probe schemes by perturbing the system and measuring the induced changes. Here, we reveal the femtosecond time-resolved autocorrelation function of the sub-THz spontaneous spin fluctuation dynamics in an orthoferrite, existent under the ambient condition due to thermal occupation. The correlation dynamics shows a significant enhancement of the amplitude and coherence time around the spin reorientation transition temperature, which is ascribed to the spontaneous switching of spin moment between the energetically degenerate states.

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2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 17. Sept. 2023 - 22. Sept. 2023, Montreal, QC, Canada
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ISO 690KURIHARA, Takayuki, Marvin WEISS, Andreas J. HERBST, Julius SCHLEGEL, Tobias DANNEGGER, Martin EVERS, Andreas DONGES, Sebastian T. B. GOENNENWEIN, Ulrich NOWAK, Alfred LEITENSTORFER, 2023. THz spontaneous magnon fluctuations and room-temperature spin switching in the orthoferrite Sm0.7Er0.3FeO3. 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Montreal, QC, Canada, 17. Sept. 2023 - 22. Sept. 2023. In: 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). Piscataway, NJ: IEEE, 2023. ISBN 979-8-3503-3660-3. Available under: doi: 10.1109/irmmw-thz57677.2023.10299332
BibTex
@inproceedings{Kurihara2023-09-17spont-68922,
  year={2023},
  doi={10.1109/irmmw-thz57677.2023.10299332},
  title={THz spontaneous magnon fluctuations and room-temperature spin switching in the orthoferrite Sm0.7Er0.3FeO3},
  isbn={979-8-3503-3660-3},
  publisher={IEEE},
  address={Piscataway, NJ},
  booktitle={2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)},
  author={Kurihara, Takayuki and Weiss, Marvin and Herbst, Andreas J. and Schlegel, Julius and Dannegger, Tobias and Evers, Martin and Donges, Andreas and Goennenwein, Sebastian T. B. and Nowak, Ulrich and Leitenstorfer, Alfred}
}
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