Work

Skyrmion soliton motion on periodic substrates by atomistic and particle-based simulations

Year: 2024

Type: article

Abstract: We compare the dynamical behavior of magnetic skyrmions interacting with square and triangular defect arrays just above commensuration using both atomistic and particle-based models. Under applied drives, the initial motion is a kink traveling through the pinned skyrmion lattice. For the square defect array, both models agree well and show a regime in which the soliton motion is locked along 45°. The atomistic model also produces locking of a soliton along 30°, which is absent in the particle-based model. For the triangular defect array, the atomistic model exhibits 30° soliton motion over a wide region of external current values. In contrast, the particle-based model gives 45° soliton motion over a small range of external driving force values. The difference arises because the nondeforming particle model facilitates meandering skyrmion orbits while the deformable atomistic model enables stronger skyrmion-skyrmion interactions that reduce the meandering. Our results indicate that soliton motion through pinned skyrmion lattices on a periodic substrate is a robust effect.

Source: Europhysics Letters (EPL)

DOI: 10.1209/0295-5075/ad91dc

Authors: J. C. B. Souza, N. P Vizarim, C. J. O. Reichhardt, C. Reichhardt, P. A. Venegas

Institutions: Universidade Estadual Paulista (Unesp), Los Alamos National Laboratory

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $1,805

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Los Alamos National Laboratory