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CONDENSED MATTER

Mechanism of the self-organization of a domain structure in magnetic films within the Ginzburg–Landau model

D. S. Mekhonoshin, L. A. Pamyatnykh

Ural Federal University named after the First President of Russia B.N. Yeltsin, 620002, Yekaterinburg, Russia

Abstract: The spontaneous formation of dynamic spiral domains, which is a type of the self-organization of a magnetic domain structure, in a thin ferromagnetic film exposed to the alternating magnetic field has been revealed in the numerical simulation within the phenomenological Ginzburg–Landau model. This simulation qualitatively reproduces the following features of the self-organization of the domain structure experimentally observed in iron garnet films: the existence of two types of spiral domains (single and double spiral domains) and the formation of the close packing of spiral domains and their chains in an inhomogeneous magnetic field. A mechanism of the formation of spiral domains without gyrotropic force has been described.

Received: 06.06.2024
Revised: 12.07.2024
Accepted: 14.07.2024

DOI: 10.31857/S0370274X24080173

 English version: Journal of Experimental and Theoretical Physics Letters, 2024, 120:4, 253–258