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VAŇATKA, M. SZULC, K. WOJEWODA, O. DUBS, C. CHUMAK, A. KRAWCZYK, M. DOBROVOLSKIY, O. KLOS, J. URBÁNEK, M.
Originální název
Spin-Wave Dispersion Measurement by Variable-Gap Propagating Spin-Wave Spectroscopy
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
Knowledge of the spin-wave dispersion relation is a prerequisite for the explanation of many magnonic phenomena as well as for the practical design of magnonic devices. Spin-wave dispersion measurement by established optical techniques such as Brillouin light scattering or the magneto-optical Kerr effect at ultralow temperatures is often forbiddingly complicated. By contrast, microwave spectroscopy can be used at all temperatures but it usually lacks spatial and wave-number resolution. Here we develop a variable-gap-propagating-spin-wave-spectroscopy (VGPSWS) method for the deduction of the dispersion relation of spin waves in a wide frequency and wave-number range. The method is based on the phase-resolved analysis of the spin-wave transmission between two antennas with variable spacing, in conjunction with theoretical data treatment. We validate the method for in-plane magnetized Co-Fe-B and yttrium iron garnet thin films in k perpendicular to B and k parallel to B geometries by deducing the full set of material and spin-wave parameters, including spin-wave dispersion, hybridization of the fundamental mode with the higher-order perpendicular standing spin-wave modes, and surface spin pinning. The compatibility of microwaves with low temperatures makes this approach attractive for cryogenic magnonics at the nanoscale.
Klíčová slova
MAGNON; FILMS
Autoři
VAŇATKA, M.; SZULC, K.; WOJEWODA, O.; DUBS, C.; CHUMAK, A.; KRAWCZYK, M.; DOBROVOLSKIY, O.; KLOS, J.; URBÁNEK, M.
Vydáno
17. 11. 2021
Nakladatel
AMER PHYSICAL SOC
Místo
COLLEGE PK
ISSN
2331-7019
Periodikum
Physical Review Applied
Ročník
16
Číslo
5
Stát
Spojené státy americké
Strany od
054033-1
Strany do
054033-10
Strany počet
10
URL
https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.16.054033