| Full text | |
| Author(s): |
Souza, J. C. Bellizotti
;
Vizarim, N. P.
;
Reichhardt, C. J. O.
;
Reichhardt, C.
;
Venegas, P. A.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | JOURNAL OF PHYSICS-CONDENSED MATTER; v. 37, n. 19, p. 7-pg., 2025-05-12. |
| Abstract | |
We examine a skyrmionium driven over a periodic anisotropy pattern, which consists of disorder free regions and disordered regions. For small defect densities, the skyrmionium flows for an extended range of currents, and there is a critical current above which it transforms into a skyrmion. For increased amounts of quenched disorder, the current needed for the skyrmionium to transform into a skyrmion decreases, and there is a critical disorder density above which a moving skyrmionium is not stable. In the moving state, the skyrmionium to skyrmion transformation leads to a drop in the velocity and the onset of a finite skyrmion Hall angle. We also find a reentrance effect in which the pinned skyrmionium transforms into a skyrmion just above depinning, restabilizes into skyrmionium at larger drives, and becomes unstable again at large currents. We also show that adding a transverse shaking drive can increase the lifetime of a moving skyrmionium by reducing the effect of the pinning in the direction of the drive. (AU) | |
| FAPESP's process: | 22/14053-8 - Study of Skyrmions Behavior in Magnetic Materials with Defects |
| Grantee: | José Carlos Bellizotti Souza |
| Support Opportunities: | Scholarships in Brazil - Master |
| FAPESP's process: | 23/17545-1 - Dynamical Behavior of Skyrmions On Magnetic Materials Interacting with Anisotropic Defects |
| Grantee: | José Carlos Bellizotti Souza |
| Support Opportunities: | Scholarships abroad - Research Internship - Master's degree |
| FAPESP's process: | 24/02941-1 - Control of magnetic textures interacting with defects aiming applications in spintronics |
| Grantee: | Pablo Antonio Venegas Urenda |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 24/13248-5 - Behavior of topological magnetic textures interacting with interfaces aiming for control and stability in spintronics |
| Grantee: | Nicolas Porto Vizarim |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |