Route to minimally dissipative switching in magnets via terahertz phonon pumping

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.

Metadata

Item Type:	Article
Authors/Creators:	Strungaru, Mara (mss555@york.ac.uk) Ellis, Matthew O.A. Ruta, Sergiu (sir503@york.ac.uk) Evans, Richard F.L. https://orcid.org/0000-0002-2378-8203 Chantrell, Roy W. https://orcid.org/0000-0001-5410-5615 Chubykalo-Fesenko, Oksana
Copyright, Publisher and Additional Information:	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.
Dates:	Published: 7 June 2024 Accepted: 14 May 2024
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Physics (York)
Depositing User:	Pure (York)
Date Deposited:	24 Jun 2024 11:50
Last Modified:	28 Feb 2025 00:08
Published Version:	https://doi.org/10.1103/PhysRevB.109.224412
Status:	Published
Refereed:	Yes
Identification Number:	10.1103/PhysRevB.109.224412
Related URLs:	http://www.scopus.com/inward/record.url?...
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:213880

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Route to minimally dissipative switching in magnets via terahertz phonon pumping

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