Publication result detail

Damping enhancement in YIG at millikelvin temperatures due to GGG substrate

SERHA, R.; VORONOV, A.; SCHMOLL, D.; KLINGBEIL, R.; KNAUER, S.; KORALTAN, S.; PRIBYTOVA, E.; LINDNER, M.; REIMANN, T.; DUBS, C.; CLAAS, A.; VERBA, R.; URBÁNEK, M.; SUESS, D.; CHUMAK, A.

Original Title

Damping enhancement in YIG at millikelvin temperatures due to GGG substrate

English Title

Damping enhancement in YIG at millikelvin temperatures due to GGG substrate

Type

Peer-reviewed article not indexed in WoS or Scopus

Original Abstract

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 -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 and temperatures below 2 K and frequencies above 10 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.

English abstract

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 -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 and temperatures below 2 K and frequencies above 10 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.

Keywords

FMR at millikelvin temperatures; Quantum magnonics; Yttrium iron garnet; Ferrimagnet/paramagnet bilayer; Magnetic damping

Key words in English

FMR at millikelvin temperatures; Quantum magnonics; Yttrium iron garnet; Ferrimagnet/paramagnet bilayer; Magnetic damping

Authors

SERHA, R.; VORONOV, A.; SCHMOLL, D.; KLINGBEIL, R.; KNAUER, S.; KORALTAN, S.; PRIBYTOVA, E.; LINDNER, M.; REIMANN, T.; DUBS, C.; CLAAS, A.; VERBA, R.; URBÁNEK, M.; SUESS, D.; CHUMAK, A.

RIV year

2026

Released

01.03.2025

Publisher

Elsevier

Periodical

Materials Today Quantum

Volume

5

Number

3

State

Kingdom of the Netherlands

Pages from

100025

Pages to

10025

Pages count

9

URL

https://www.sciencedirect.com/science/article/pii/S2950257825000034

Full text in the Digital Library

http://hdl.handle.net/11012/255629

BibTex

@article{BUT197895,
  author="Rostyslav O. {Serha} and Andrey {Voronov} and David {Schmoll} and Rebecca {Klingbeil} and Sebastian {Knauer} and Sabri {Koraltan} and Ekaterina {Pribytova} and Morris {Lindner} and Timmy {Reimann} and Carsten {Dubs} and Abert {Claas} and Roman {Verba} and Michal {Urbánek} and Dieter {Suess} and Andrii V. {Chumak}",
  title="Damping enhancement in YIG at millikelvin temperatures due to GGG substrate",
  journal="Materials Today Quantum",
  year="2025",
  volume="5",
  number="3",
  pages="100025--10025",
  doi="10.1016/j.mtquan.2025.100025",
  url="https://www.sciencedirect.com/science/article/pii/S2950257825000034"
}