Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916838782271488 |
|---|---|
| author | Serha, Rostyslav O. Voronov, Andrey A. Schmoll, David Klingbeil, Rebecca Knauer, Sebastian Koraltan, Sabri Pribytova, Ekaterina Lindner, Morris Reimann, Timmy Dubs, Carsten Abert, Claas Verba, Roman Urbánek, Michal Suess, Dieter Chumak, Andrii V. |
| author_facet | Serha, Rostyslav O. Voronov, Andrey A. Schmoll, David Klingbeil, Rebecca Knauer, Sebastian Koraltan, Sabri Pribytova, Ekaterina Lindner, Morris Reimann, Timmy Dubs, Carsten Abert, Claas Verba, Roman Urbánek, Michal Suess, Dieter Chumak, Andrii V. |
| contents | Quantum magnonics aims to exploit the quantum mechanical properties of magnons for nanoscale quantum information technologies. Ferrimagnetic yttrium iron garnet (YIG), which offers the longest magnon lifetimes, is a key material typically grown on gadolinium gallium garnet (GGG) substrates for structural compatibility. However, the increased magnetic damping in YIG/GGG systems below 50$\,$K poses a challenge for quantum applications. Here, we study the damping in a 97$\,$nm-thick YIG film on a 500$\,μ$m-thick GGG substrate at temperatures down to 30$\,$mK using ferromagnetic resonance (FMR) spectroscopy. We show that the dominant physical mechanism for the observed tenfold increase in FMR linewidth at millikelvin temperatures is the non-uniform bias magnetic field generated by the partially magnetized paramagnetic GGG substrate. Numerical simulations and analytical theory show that the GGG-driven linewidth enhancement can reach up to 6.7 times. In addition, at low temperatures and frequencies above 18$\,$GHz, the FMR linewidth deviates from the viscous Gilbert-damping model. These results allow the partial elimination of the damping mechanisms attributed to GGG, which is necessary for the advancement of solid-state quantum technologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_02827 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate Serha, Rostyslav O. Voronov, Andrey A. Schmoll, David Klingbeil, Rebecca Knauer, Sebastian Koraltan, Sabri Pribytova, Ekaterina Lindner, Morris Reimann, Timmy Dubs, Carsten Abert, Claas Verba, Roman Urbánek, Michal Suess, Dieter Chumak, Andrii V. Mesoscale and Nanoscale Physics Materials Science Other Condensed Matter Quantum magnonics aims to exploit the quantum mechanical properties of magnons for nanoscale quantum information technologies. Ferrimagnetic yttrium iron garnet (YIG), which offers the longest magnon lifetimes, is a key material typically grown on gadolinium gallium garnet (GGG) substrates for structural compatibility. However, the increased magnetic damping in YIG/GGG systems below 50$\,$K poses a challenge for quantum applications. Here, we study the damping in a 97$\,$nm-thick YIG film on a 500$\,μ$m-thick GGG substrate at temperatures down to 30$\,$mK using ferromagnetic resonance (FMR) spectroscopy. We show that the dominant physical mechanism for the observed tenfold increase in FMR linewidth at millikelvin temperatures is the non-uniform bias magnetic field generated by the partially magnetized paramagnetic GGG substrate. Numerical simulations and analytical theory show that the GGG-driven linewidth enhancement can reach up to 6.7 times. In addition, at low temperatures and frequencies above 18$\,$GHz, the FMR linewidth deviates from the viscous Gilbert-damping model. These results allow the partial elimination of the damping mechanisms attributed to GGG, which is necessary for the advancement of solid-state quantum technologies. |
| title | Damping Enhancement in YIG at Millikelvin Temperatures due to GGG Substrate |
| topic | Mesoscale and Nanoscale Physics Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2412.02827 |