Terahertz-driven coherent magnetization dynamics in labyrinth-type domain networks
The controlled manipulation of spins on ultrashort timescales is among the most promising solutions for novel high-speed and low-power-consumption spintronic and magnetic recording applications. To do so, terahertz (THz) light pulses can be used to drive coherent magnetization dynamics in ferromagnetic thin films. We were able to resolve these dynamics on the nanoscale employing THz-pump x-ray resonant magnetic scattering from the labyrinth-type domain network of a Co/Pt multilayer with perpendicular magnetic anisotropy. Our results reveal THz-driven ultrafast demagnetization as well as coherent local magnetization oscillations at the THz fundamental frequency of $2.5\phantom{\rule{0.16em}{0ex}}\mathrm{THz}$. We observe a temporal lag between femtosecond demagnetization and the start of the coherent magnetization oscillations that can be understood by a time-dependent damping. The dynamics of the domain and domain-wall contributions are found to be highly correlated, suggesting the applicability of THz spin control in magnetic nanostructures.
Authors
- Leonard Müller (ORCID: https://orcid.org/0000-0002-7331-3804)
- Kai Bagschik
- Torsten Golz (ORCID: https://orcid.org/0000-0002-5532-4884)
- Christine Boeglin
- Deeksha Gupta (ORCID: https://orcid.org/0009-0005-9472-1486)
- G. Grübel
- Rustam Rysov (ORCID: https://orcid.org/0000-0002-7589-0808)
- Robert Frömter (ORCID: https://orcid.org/0000-0002-3399-5628)
- Simon Marotzke (ORCID: https://orcid.org/0000-0003-1514-5264)
- Marcel Hennes (ORCID: https://orcid.org/0000-0003-3405-9601)
- S. Bajt (ORCID: https://orcid.org/0000-0002-7163-7602)
- A. Kobs (ORCID: https://orcid.org/0000-0001-7842-9577)
- Wojciech Roseker (ORCID: https://orcid.org/0000-0002-2739-077X)
- Matthias Riepp (ORCID: https://orcid.org/0000-0001-9889-4003)
- Michael Walther (ORCID: https://orcid.org/0000-0002-5256-1710)
- N. Stojanovic (ORCID: https://orcid.org/0000-0003-1153-115X)
- Rui Pan (ORCID: https://orcid.org/0000-0002-4821-1419)
Institutions
- Universität Hamburg (DE)
- Johannes Gutenberg University Mainz (DE)
- Deutsches Elektronen-Synchrotron DESY (DE)
- Christian-Albrechts-Universität zu Kiel (DE)
- Institut de Physique et Chimie des Matériaux de Strasbourg (FR)
- Institut des NanoSciences de Paris (FR)
- Center for Free-Electron Laser Science (DE)
- Hamburg Centre for Ultrafast Imaging
- Université de Strasbourg (FR)
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2024-09-03
- DOI
- https://doi.org/10.1103/physrevb.110.094405
- Citations
- 4
- Primary Topic
- Magnetic properties of thin films
- Type
- article
- Field-Weighted Citation Impact
- 1.35
Funders
- Howard Gilman Foundation
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- Deutsches Elektronen-Synchrotron
- H2020 Marie Skłodowska-Curie Actions