Cited by 110Magnetic properties of thin filmsTerahertz technology and applicationsAdvanced Condensed Matter Physics

Ultrafast terahertz magnetometry

Open access
Zhang, Wentao, Maldonado, Pablo, Jin, Zuanming, Seifert, Tom S., Arabski, Jacek, Schmerber, Guy, Beaurepaire, Eric, Bonn, Mischa +3 more·2020·Nature Communications

Abstract

A material’s magnetic state and its dynamics are of great fundamental research interest and are also at the core of a wide plethora of modern technologies. However, reliable access to magnetization dynamics in materials and devices on the technologically relevant ultrafast timescale, and under realistic device-operation conditions, remains a challenge. Here, we demonstrate a method of ultrafast terahertz (THz) magnetometry, which gives direct access to the (sub-)picosecond magnetization dynamics even in encapsulated materials or devices in a contact-free fashion, in a fully calibrated manner, and under ambient conditions. As a showcase for this powerful method, we measure the ultrafast magnetization dynamics in a laser-excited encapsulated iron film. Our measurements reveal and disentangle distinct contributions originating from (i) incoherent hot-magnon-driven magnetization quenching and (ii) coherent acoustically-driven modulation of the exchange interaction in iron, paving the way to technologies utilizing ultrafast heat-free control of magnetism. High sensitivity and relative ease of experimental arrangement highlight the promise of ultrafast THz magnetometry for both fundamental studies and the technological applications of magnetism.

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  • THz emission spectroscopy has emerged as a potentially valuable contact-free probe of magnetization dynamics in a variety of materials.

    “THz emission spectroscopy has emerged as a potentially valuable contact-free probe of magnetization dynamics in a variety of materials122.”
  • When a thin FM metallic film is combined with a non-magnetic layer in a heterostructure, the THz emission intensity is dramatically enhanced far beyond what is expected from demagnetization in the magnetic layer alone.

    “when a thin FM metallic film is combined with a non-magnetic (NM) layer in a heterostructure configuration, the THz emission intensity is dramatically enhanced, far beyond what is expected from demagnetization in the magnetic layer alone53,122.”

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Authors
Zhang, W., Maldonado, P., Jin, Z., Seifert, T. S., Arabski, J., Schmerber, G., Beaurepaire, E., Bonn, M., Kampfrath, T., Oppeneer, P. M., & Turchinovich, D.
Affiliations
  • Bielefeld University (DE)
  • Uppsala University (SE)
  • University of Shanghai for Science and Technology (CN)
  • ETH Zurich (CH)
  • Centre National de la Recherche Scientifique (FR)
  • Max Planck Institute for Polymer Research (DE)
  • Freie Universität Berlin (DE)
Corresponding author
Turchinovich, Dmitry
Venue
Nature Communications
Published
2020-08-25
Volume
11
Issue
1
Pages
4247-4247
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3080725279
Cited by
110
References
61
Citations by year
2026: 7 · 2025: 21 · 2024: 15 · 2023: 27 · 2022: 22 · 2021: 17 · 2020: 1
FWCI
6.76
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Refubium (Universitätsbibliothek der Freien Universität Berlin) (submittedVersion, cc-by)
  • Uppsala University Publications (Uppsala University) (submittedVersion, other-oa)
  • HAL (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Publikationen an der Universität Bielefeld (Universität Bielefeld) (submittedVersion, cc-by)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • Universitätsbibliothek der FU Berlin Hochschulschriftenstelle u. Dokumentenserver (cc-by)
  • ETH Zürich Research Collection (cc-by)
Funders
  • Chinese Scholarship Council
  • Vetenskapsrådet
  • Knut och Alice Wallenbergs Stiftelse (2015.0060)
  • Swedish National Infrastructure for Computing
  • Deutsche Forschungsgemeinschaft (278162697 – SFB 1242)
Topics
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Magnetic properties of thin films
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Terahertz technology and applications
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
Keywords
magnetization dynamics, iron films, non-contact measurement

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