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TT: Fachverband Tiefe Temperaturen

TT 80: Correlated Electrons: Poster

TT 80.51: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster E

Actively moving domain in a driven ferrimagnet — •Reza Doostani, Achim Rosch, Dennis Hardt, and Nina del Ser — Institute for Theoretical Physics, University of Cologne, Germany

We investigate the behavior of a ferrimagnet driven by a weak oscillating staggered magnetic field. The undriven system can be described by Heisenberg energy term and magnetocrystalline anisotropy. Numerical and analytical studies of this classical spin model using Landau-Lifshitz-Gilbert equation show the existence of a rotational Goldstone mode. We Also study the long-range order of the system in presence of thermal fluctuation in one and three dimension. Further analysis can be done by inserting a domain wall into the system. Driving the system results in the movements of domain wall with speed v which interestingly is linear to the field amplitude. This claim is realized both analytically and numerically.

Keywords: nonequilibrium; domain wall