Applied Spin Phenomena
Published March 5, 2026 | Version v1
Dataset Open

Phase-resolved imaging of coherent phonon-magnon coupling

Authors/Creators

  • 1. ROR icon Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau
  • 2. University of Augsburg
  • 3. ROR icon University of Kaiserslautern
  • 4. ROR icon University of Groningen

Description

We use a direct phase-resolved optical technique to study the coherence of spin waves (SWs) that
are driven by surface acoustic waves (SAWs) via resonant magnetoelastic coupling. For this, we
employ a piezoelectric lithium tantalate (LiTaO3) substrate, equipped with micropatterned inter-
digital transducers for SAW excitation, which interact with SWs in a 5 nm thin and 20 μm wide
Co40Fe40B20-waveguide. We detect the SAW and the SW using a phase-locked micro-focused opti-
cal polarization detection experiment and use the characteristic polarization dependence to separate
the SAW and SW signals. Our measurements directly image the resonant and coherent excitation
of the SW by the SAW.

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Additional details

Identifiers

arXiv
arXiv:2603.06115

Funding

European Commission
MAWiCS - Magneto-Acoustic Waves in Complex Spin Systems 101044526
Deutsche Forschungsgemeinschaft
Nicht-reziproke Akustik für die Spinwellendynamik 492421737
Deutsche Forschungsgemeinschaft
Spin+Magnon: Magnonen-Anregungen für die Datenverarbeitung (B01) 268565370
Deutsche Forschungsgemeinschaft
Spin+Torque: Spin-orbit dynamics in magnetic hybrids (B13) 268565370

Dates

Submitted
2026-03-05
To ArXiv