Abstract
Ultrafast switching of magnetic materials has been shown to be predominantly thermally driven, but excess heating limits the energy efficiency of this process. By employing atomistic spin-lattice dynamics simulations, we show that efficient coherent magnetization switching of an insulating magnet can be triggered by a THz excitation of phonons. We find that switching is driven by excitation near the P point of the phonon spectrum in conditions where spins typically cannot be excited and when manifold k phonon modes are accessible at the same frequency. Our model determines the necessary ingredients for low-dissipative switching and provides insight into THz-excited spin dynamics with a route to energy efficient ultrafast devices.
| Original language | English |
|---|---|
| Article number | 224412 |
| Number of pages | 8 |
| Journal | Physical Review B |
| Volume | 109 |
| Issue number | 22 |
| DOIs | |
| Publication status | Published - 7 Jun 2024 |
Bibliographical note
Funding Information:Financial support of the Advanced Storage Research Consortium and ARCHER2-eCSE06-6 is gratefully acknowledged. M.O.A.E. gratefully acknowledges support in part from EPSRC through Grant No. EP/S009647/1. The simulations were undertaken on the VIKING cluster at the University of York. S.R., R.W.C., and R.F.L.E. acknowledge funding from European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 737709. The authors acknowledge the networking opportunities provided by the European COST Action No. CA17123 Magnetofon and the short-time scientific mission awarded to M.S
Funding Information:
Financial support of the Advanced Storage Research Consortium and ARCHER2-eCSE06-6 is gratefully acknowledged. M.O.A.E. gratefully acknowledges support in part from EPSRC through Grant No. EP/S009647/1. The simulations were undertaken on the VIKING cluster at the University of York. S.R., R.W.C., and R.F.L.E. acknowledge funding from European Union's Horizon 2020 Research and Innovation Program under Grant Agreement No. 737709. The authors acknowledge the networking opportunities provided by the European COST Action No. CA17123 Magnetofon and the short-time scientific mission awarded to M.S.
Publisher Copyright:
© 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.