Guided skyrmion motion along pinning array interfaces

Author(s)

Vizarim, N. P. ^{[1, 2, 3]} ; Reichhardt, C. ^{[1, 2]} ; Venegas, P. A. ^[4] ; Reichhardt, C. J. O. ^{[1, 2]}

Affiliation

^[1] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 - USA

^[2] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 - USA

^[3] Univ Estadual Paulista UNESP, Fac Ciencias, POSMAT Programa Posgrad Ciencia & Tecnol Mat, SP CP 473, BR-17033360 Bauru, SP - Brazil

^[4] Univ Estadual Paulista UNESP, Fac Ciencias, Dept Fis, SPCP 473, BR-17033360 Bauru, SP - Brazil

• Document type: Journal article
• Source: Journal of Magnetism and Magnetic Materials; v. 528, JUN 15 2021.
• Web of Science Citations: 0

Abstract

We examine ac driven skyrmions interacting with the interface between two different obstacle array structures. We consider drive amplitudes at which skyrmions in a bulk obstacle lattice undergo only localized motion and show that when an obstacle lattice interface is introduced, directed skyrmion transport can occur along the interface. The skyrmions can be guided by a straight interface and can also turn corners to follow the interface. For a square obstacle lattice embedded in a square pinning array with a different obstacle radius, we find that skyrmions can undergo transport in all four primary symmetry directions under the same fixed ac drive. We map where localized or translating motion occurs as a function of the ac driving parameters. Our results suggest a new method for controlling skyrmion motion based on transport along obstacle lattice interfaces. (AU)

• FAPESP's process: 18/13198-7 - Dynamic behavior of skyrmions under the influence of periodic pinning in chiral magnetic infinite thin films
• Grantee: Nicolas Porto Vizarim
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate