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CMP
Credit: Jack Hobhouse

Finlay Ryburn

Student Visitor

Research theme

  • Quantum materials

Sub department

  • Condensed Matter Physics

Research groups

  • Quantum magnonics
  • Spintronics
finlay.ryburn@physics.ox.ac.uk
Clarendon Laboratory, room 174,173
  • About
  • Publications

Generation of gigahertz-frequency surface acoustic waves in Y 3 Fe 5 O 12 /ZnO heterostructures

Physical Review Applied American Physical Society (APS) 23:3 (2025) 34062

Authors:

Finlay Ryburn, Kevin Künstle, Yangzhan Zhang, Yannik Kunz, Timmy Reimann, Morris Lindner, Carsten Dubs, John F Gregg, Mathias Weiler

Abstract:

<jats:p>We study surface acoustic waves (SAWs) in yttrium iron garnet (YIG)/zinc oxide (ZnO) heterostructures, comparing the results of a computationally lightweight analytical model with time-resolved microfocused Brillouin light scattering (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><a:mtext fontfamily="times">μ</a:mtext></a:math>-BLS) data. Interdigital transducers (IDTs), with operational frequencies in the gigahertz regime, were fabricated on 50-nm and 100-nm thin films of YIG prior to sputter deposition of 830-nm and 890-nm films of piezoelectric ZnO. We find good agreement between our analytical model and <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"><e:mtext fontfamily="times">μ</e:mtext></e:math>-BLS data of the IDT frequency response and SAW group velocity, with clear differentiation between the Rayleigh-like and Sezawa-like modes. Finally, nonreciprocal coupling between SAWs and spin waves (SWs) is shown. This work paves the way for a detailed study of the interaction between SAWs and SWs in low SW damping YIG, with the possibility of a method for future energy-efficient SW excitation.</jats:p> <jats:sec> <jats:title/> <jats:supplementary-material> <jats:permissions> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material> </jats:sec>
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Efficient spin-wave excitation by surface acoustic waves in ultra-low damping YIG/ZnO-heterostructures

ArXiv 2503.11203 (2025)

Authors:

Yannik Kunz, Julian Schüler, Finlay Ryburn, Kevin Künstle, Michael Schneider, Katharina Lasinger, Yangzhan Zhang, Philipp Pirro, John Gregg, Mathias Weiler
Details from ArXiV

Generation of gigahertz frequency surface acoustic waves in YIG/ZnO heterostructures

ArXiv 2403.03006 (2024)

Authors:

Finlay Ryburn, Kevin Künstle, Yangzhan Zhang, Yannik Kunz, Timmy Reimann, Morris Lindner, Carsten Dubs, John F Gregg, Mathias Weiler
Details from ArXiV

An undergraduate laboratory study of the polarisation of annihilation photons using Compton scattering

European Journal of Physics IOP Publishing 39:4 (2018) 045202

Authors:

P Knights, F Ryburn, G Tungate, K Nikolopoulos
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Studying the effect of polarisation in Compton scattering in the undergraduate laboratory

European Journal of Physics IOP Publishing 39:2 (2018) 025203

Authors:

P Knights, F Ryburn, G Tungate, K Nikolopoulos
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