Soliton motion induced along ferromagnetic skyrmion chains in chiral thin nanotracks

Autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: Journal of Magnetism and Magnetic Materials; v. 587, p. 9-pg., 2023-09-25.

Resumo

Using atomistic magnetic simulations we investigate the soliton motion along a pinned skyrmion chain containing an interstitial skyrmion. We find that the soliton can exhibit stable motion along the chain without a skyrmion Hall effect for an extended range of drives. Under a constant drive the solitons have a constant velocity. We also measure the skyrmion velocity-current curves and identify the signatures of different phases including a pinned phase, stable soliton motion, and quasi-free motion at higher drives where all of the skyrmions depin from the pinning centers and move along the rigid wall. In the quasi-free motion regime, the velocity is oscillatory due to the motion of the skyrmions over the pinning sites. For increasing pinning strength, the onset of soliton motion shifts to higher values of current density. We also find that for stronger pinning, the characteristic velocity-current shape is affected by the annihilation of single or multiple skyrmions in the drive interval over which the soliton motion occurs. Our results indicate that stable skyrmion soliton motion is possible and that the solitons could be used as information carriers instead of the skyrmions themselves for technological applications. (AU)

• Processo FAPESP: 17/20976-3 - Comportamento dinâmico de skyrmions sob influência de arranjos periódicos de centros de aprisionamento em filmes finos infinitos de materiais magnéticos quirais
• Beneficiário: Nicolas Porto Vizarim
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 22/14053-8 - Estudo do Comportamento de Skrymions em Materiais Magnéticos na Presença de Defeitos
• Beneficiário: José Carlos Bellizotti Souza
• Modalidade de apoio: Bolsas no Brasil - Mestrado