Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: EPL; v. 148, n. 5, p. 8-pg., 2024-12-01.

Resumo

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 degrees. The atomistic model also produces locking of a soliton along 30 degrees, which is absent in the particle-based model. For the triangular defect array, the atomistic model exhibits 30 degrees soliton motion over a wide region of external current values. In contrast, the particle-based model gives 45 degrees 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. (AU)

• Processo FAPESP: 23/17545-1 - Comportamento Dinâmico de Skyrmions em Materiais Magnéticos Interagindo com Defeitos Anisotrópicos
• Beneficiário: José Carlos Bellizotti Souza
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 21/04655-8 - Aprendizagem de máquina e suas aplicações na física quântica: metrologia, termologia, transições de fase e desacoplamento dinâmico
• Beneficiário: Felipe Fernandes Fanchini
• Modalidade de apoio: Auxílio à Pesquisa - Regular