Efficient spin-wave excitation by surface acoustic waves in ultra-low damping YIG/ZnO-heterostructures
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arXiv
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| Format: | Preprint |
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2025
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| author | Kunz, Yannik Schüler, Julian Ryburn, Finlay Künstle, Kevin Schneider, Michael Lasinger, Katharina Zhang, Yangzhan Pirro, Philipp Gregg, John Weiler, Mathias |
| author_facet | Kunz, Yannik Schüler, Julian Ryburn, Finlay Künstle, Kevin Schneider, Michael Lasinger, Katharina Zhang, Yangzhan Pirro, Philipp Gregg, John Weiler, Mathias |
| contents | We demonstrate the efficient excitation of spin waves in the ultra-low magnetic damping material yttrium-iron-garnet (YIG) by surface acoustic waves (SAWs). To this end, we employ interdigital transducers fabricated on a piezoelectric zinc oxide (ZnO) thin film covering the YIG. This enables the excitation of coherent, propagating Rayleigh-type and Sezawa-type SAWs. We find that the ultralow magnetic damping of YIG is retained after the ZnO-deposition and we carry out a comprehensive investigation of the magnetoelastic interaction due to the different SAW modes as a function of the external magnetic field magnitude and orientation. By measuring the SAW attenuation our experiments reveal a highly anisotropic and non-reciprocal SAW-SW-interaction in agreement with our model caluclation, while demonstrating that low-damping magnons can be efficiently excited by SAWs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_11203 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Efficient spin-wave excitation by surface acoustic waves in ultra-low damping YIG/ZnO-heterostructures Kunz, Yannik Schüler, Julian Ryburn, Finlay Künstle, Kevin Schneider, Michael Lasinger, Katharina Zhang, Yangzhan Pirro, Philipp Gregg, John Weiler, Mathias Mesoscale and Nanoscale Physics We demonstrate the efficient excitation of spin waves in the ultra-low magnetic damping material yttrium-iron-garnet (YIG) by surface acoustic waves (SAWs). To this end, we employ interdigital transducers fabricated on a piezoelectric zinc oxide (ZnO) thin film covering the YIG. This enables the excitation of coherent, propagating Rayleigh-type and Sezawa-type SAWs. We find that the ultralow magnetic damping of YIG is retained after the ZnO-deposition and we carry out a comprehensive investigation of the magnetoelastic interaction due to the different SAW modes as a function of the external magnetic field magnitude and orientation. By measuring the SAW attenuation our experiments reveal a highly anisotropic and non-reciprocal SAW-SW-interaction in agreement with our model caluclation, while demonstrating that low-damping magnons can be efficiently excited by SAWs. |
| title | Efficient spin-wave excitation by surface acoustic waves in ultra-low damping YIG/ZnO-heterostructures |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2503.11203 |