Resonant thermal energy transfer to magnons in a ferromagnetic nanolayer

Kobecki, Michal; Scherbakov, Alexey V; Linnik, Tetiana L; Kukhtaruk, Serhii M; Gusev, Vitalyi E; Pattnaik, Debi P; Akimov, Ilya A; Rushforth, Andrew W; Akimov, Andrey V; Bayer, Manfred

Abstract

Energy harvesting is a concept which makes dissipated heat useful by transferring thermal energy to other excitations. Most of the existing principles are realized in systems which are heated continuously. We present the concept of high-frequency energy harvesting where the dissipated heat in a sample excites resonant magnons in a thin ferromagnetic metal layer. The sample is excited by femtosecond laser pulses with a repetition rate of 10 GHz which results in temperature modulation at the same frequency with amplitude ~0.1 K. The alternating temperature excites magnons in the ferromagnetic nanolayer which are detected by measuring the net magnetization precession. When the magnon frequency is brought onto resonance with the optical excitation, a 12-fold increase of the amplitude of precession indicates efficient resonant heat transfer from the lattice to coherent magnons. The demonstrated principle may be used for energy harvesting in various nanodevices operating at GHz and sub-THz frequency ranges.

Citation

Kobecki, M., Scherbakov, A. V., Linnik, T. L., Kukhtaruk, S. M., Gusev, V. E., Pattnaik, D. P., …Bayer, M. (2020). Resonant thermal energy transfer to magnons in a ferromagnetic nanolayer. Nature Communications, 11(1), Article 4130. https://doi.org/10.1038/s41467-020-17635-1

• Journal Article Type: Article
• Acceptance Date: Jul 2, 2020
• Online Publication Date: Aug 17, 2020
• Publication Date: 2020-12
• Deposit Date: Jul 2, 2020
• Publicly Available Date: Aug 24, 2020
• Journal: Nature Communications
• Electronic ISSN: 2041-1723
• Publisher: Nature Publishing Group
• Peer Reviewed: Peer Reviewed
• Volume: 11
• Issue: 1
• Article Number: 4130
• DOI: https://doi.org/10.1038/s41467-020-17635-1
• Keywords: General Biochemistry, Genetics and Molecular Biology; General Physics and Astronomy; General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/4745407
• Publisher URL: https://www.nature.com/articles/s41467-020-17635-1