Elastostatic spin waves — 'fine structure' of magnon polaron spectrum of acoustically subwavelength magnetic layer

S.V. Tarasenko^†^a, V.G. Shavrov^b
^aGalkin Donetsk Institute for Physics and Engineering, R. Luxemburg str. 72, Donetsk, 283048
^bKotelnikov Institute of Radioengineering and Electronics of the Russian Academy of Sciences, ul. Mokhovaya 11, kor. 7, Moscow, 125009, Russian Federation

Using the example of a solitary acoustically subwave„length magnetic layer, it is shown that employing the tensor Green's function to solve the elastostatic boundary value problem makes it possible to obtain the spectrum structure of magnon polarons in a form convenient for analysis, associated with the formation of a special class of exchange-free magnons — elastostatic spin waves and resonance anomalies accompanying them. In combination with a similar approach previously developed for calculating the spectrum of dipole-exchange magnons, the method can be an alternative to the traditional method of studying analytically the dispersion features of magnetoacoustic waves propagating in layered structures under conditions of simultaneous magnetoelastic, magnetodipole, and inhomogeneous exchange interactions.

Correspondence should be addressed to
Keywords: acoustically subwavelength magnetic layers, magnon polarons, Green's functions
PACS: 75.30.Ds, 75.70.Ak, 75.76.+j (all)
DOI: 10.3367/UFNe.2025.03.039878
URL: https://ufn.ru/en/articles/2025/9/f/
Web of Science

001606315700006
Scopus

2-s2.0-105021819015
ADS NASA

2025PhyU...68..947T
Citation: Tarasenko S V, Shavrov V G "Elastostatic spin waves — 'fine structure' of magnon polaron spectrum of acoustically subwavelength magnetic layer" Phys. Usp. 68 947–953 (2025)

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Received: 19th, January 2025, accepted: 11th, March 2025

Оригинал: Тарасенко С В, Шавров В Г «Эластостатические спиновые волны — "тонкая структура" спектра магнонных поляронов акустически субволнового магнитного слоя» УФН 195 1008–1014 (2025); DOI: 10.3367/UFNr.2025.03.039878

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