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Title (eng)
"Fast long-wavelength exchange spin waves in partially compensated Ga:YIG" T. Böttcher, M. Ruhwedel, K. O. Levchenko, Q. Wang, H. L. Chumak, M. A. Popov, I. V. Zavislyak, C. Dubs, O. Surzhenko, B. Hillebrands, A. V. Chumak, P. Pirro, Appl. Phys. Lett. 120, 102401 (2022)
DMP Dataset
Uploader
Khrystyna Levchenko
Description (eng)
Article 'Fast long-wavelength exchange spin waves in partially compensated Ga:YIG' by T. Böttcher, et al., Appl. Phys. Lett. 120, 102401 (2022) with respective datasets. Data in origin, txt, png, s2p, doc and excel formats are sorted into folders according to the measurement procedure and respective sample. The nature of the datasets is described in the file and folder titles. The article is partially funded by the Austrian Science Fund (FWF) via grant no. I 4696-N (Nano-YIG). ABSTRACT Spin waves in yttrium iron garnet (YIG) nano-structures attract increasing attention from the perspective of novel magnon-based data processing applications. For short wavelengths needed in small-scale devices, the group velocity is directly proportional to the spin-wave exchange stiffness constant λex. Using wave vector resolved Brillouin light scattering spectroscopy, we directly measure λex in Ga-substituted YIG thin films and show that it is about three times larger than for pure YIG. Consequently, the spin-wave group velocity overcomes the one in pure YIG for wavenumbers k > 4 rad/μm, and the ratio between the velocities reaches a constant value of around 3.4 for all k > 20 rad/μm. As revealed by vibrating-sample magnetometry and ferromagnetic resonance spectroscopy, Ga:YIG films with thicknesses down to 59 nm have a low Gilbert damping (⁠α<10^(−3)), a decreased saturation magnetization μ_0 M_s ≈ 20  mT, and a pronounced out-of-plane uniaxial anisotropy of about μ_0 H_u1 ≈ 95 mT, which leads to an out-of-plane easy axis. Thus, Ga:YIG opens access to fast and isotropic spin-wave transport for all wavelengths in nano-scale systems independently of dipolar effects.
Keywords (eng)
MagnonicsSpin waveBrillouin light scattering (BLS) spectroscopyNanoscaleMagnetismFerromagnetic resonance (FMR) spectrscopyYttrium Iron Garnet (YIG)Gallium-substituted Yttrium Iron Garnet (Ga:YIG)Exchange spin waves
Subject (eng)
ÖFOS 2012 -- 103017 -- Magnetism
Type (eng)
dataset
Type (eng)
journal article
Type (eng)
project deliverable
Type (eng)
research report
Language
English [eng]
Persistent identifier
https://phaidra.univie.ac.at/o:1980089
Project
Title (eng)
Functional layers of nm-thick YIG films and microstructures, NanoYIG
Code / Identifier
I 4696-N
Acronym
NanoYIG
Project description (eng)
This project received funding from the Austrian Science Fund (FWF) under the International Project program (project number I 4696-N).
Start date
2019-10-01
End date
2023-04-30
Project homepage
https://nanomag.univie.ac.at/research/finished-projects/functional-yig/
Association (eng)
Nanomagnetism and Magnonics
License
CC BY-SA 4.0 International