This article is cited in 3 papers

CONDENSED MATTER

Dynamic susceptibility of skyrmion crystal

V. E. Timofeev^abc, D. N. Aristov<sup>ac

a</sup> Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute, Gatchina, 188300 Russia
^b St. Petersburg Electrotechnical University LETI, St. Petersburg, 197376 Russia
^c St. Petersburg State University, St. Petersburg, 199034 Russia

Abstract: Using stereographic projection approach, we develop a theory for calculation of dynamic susceptibility tensor of Skyrmion crystals (SkX), formed in thin ferromagnetic films with Dzyaloshinskii–Moriya interaction and in the external magnetic field. Staying whenever possible within analytical framework, we employ the model ansatz for static SkX configuration and discuss small fluctuations around it. The obtained formulas are numerically analyzed in the important case of uniform susceptibility, accessible in magnetic resonance experiments. We show that, in addition to three characteristic magnetic resonance frequencies discussed earlier both theoretically and experimentally, one should also expect several resonances of smaller amplitude at somewhat higher frequencies.

Received: 20.12.2022
Revised: 19.03.2023
Accepted: 06.04.2023

DOI: 10.31857/S1234567823090070

 English version: Journal of Experimental and Theoretical Physics Letters, 2023, 117:9, 676–680