Related Experiment Video
Updated: Jun 22, 2025
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Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
11.3K
Magnon-phonon Fermi resonance in antiferromagnetic CoF2
Thomas W J Metzger1, Kirill A Grishunin2, Chris Reinhoffer3
1Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, Nijmegen, 6525 AJ, The Netherlands. thomas.metzger@ru.nl.
Nature Communications
|June 28, 2024
Summary
We discovered a new way to control magnon-phonon dynamics in antiferromagnets using a Fermi resonance. This finding is key for developing antiferromagnetic spintronics and magnonics technologies.
Area of Science:
- Condensed Matter Physics
- Quantum Materials
Background:
- Spin-lattice interactions are crucial for antiferromagnetic spintronics and magnonics.
- Coherent nonlinear phonon dynamics mediated by magnons have been recently observed.
Purpose of the Study:
- To investigate a strongly coupled two-magnon-one phonon state for coherent control of magnon-phonon dynamics.
- To explore magnon-phonon Fermi resonance in antiferromagnetic materials.
Main Methods:
- Utilizing intense narrow-band terahertz (THz) pulses and tunable magnetic fields (up to 7 T).
- Performing THz pump-infrared probe spectroscopy.
- Conducting complementary simulations.
Main Results:
- Experimental realization of magnon-phonon Fermi resonance conditions in antiferromagnetic CoF2.
- Observation of energy transfer between magnon and phonon subsystems.
- Identification of nonlinear interaction fingerprints facilitating energy exchange.
Conclusions:
- A strongly coupled two-magnon-one phonon state offers a novel pathway for coherent control.
- Magnon-phonon Fermi resonance enables energy harvesting between spin and lattice subsystems.
- Understanding these dynamics is vital for advancing antiferromagnetic spintronics and magnonics.
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