Dynamic behavior of skyrmions under the influence of periodic pinning in chiral magnetic infinite thin films

• Grant number: 17/20976-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2018
• End date: August 23, 2023
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Pablo Antonio Venegas Urenda
• Grantee: Nicolas Porto Vizarim
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated scholarship(s): 18/13198-7 - Dynamic behavior of skyrmions under the influence of periodic pinning in chiral magnetic infinite thin films, BE.EP.DR

Abstract

Skyrmions are quasi-particles that were originally proposed theoretically by the British physicist Tony Skyrme. Magnetic skyrmions correspond to a distribution of spins pointing in all directions under a sphere, and are present in ferromagnetic materials, liquid crystals, Bose-Einstein condensates and others. Recently, magnetic skyrmions were observed in chiral magnets. In these materials occurs the formation of skyrmions in a vortex-like structure, stabilizing in a regular hexagonal lattice due to their repulsive interaction. One of the most interesting features of skyrmions is its ability to get into motion when subjected to ultralow values of a spin-polarized current. This is a very promising feature for applications in spintronics, since skyrmions can be manipulated with a low energy cost. Thus, understanding skyrmion dynamics and how to control their movement in these materials is crucial for future technological applications.In the present project we will simulate the dynamics of skyrmions in a two-dimensional chiral magnet under the influence of periodic pinning landscape with zero temperature. Therefore, we will use several pinning arrays such as square, hexagonal, Kagomé and honeycomb, and we will vary the applied magnetic field in order to control the density of skyrmions inside the sample. We will show if the effects of commensurability influences the dynamic regimes and the depinning forces. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

VERGA, L. G.; VIZARIM, N. P.; CARLONE, M.; VENEGAS, P. A.. Vortex Dynamic Phases in Type II Superconducting Strips with Regular and Flattened Triangular Pinning Arrays. Journal of Superconductivity and Novel Magnetism, v. 32, n. 5, p. 1179-1190, MAY 2019. (12/22141-2, 17/20976-3)

BELLIZOTTI SOUZA, J. C.; VIZARIM, N. P.; REICHHARDT, C. J. O.; REICHHARDT, C.; VENEGAS, P. A.. Skyrmion ratchet in funnel geometries. Physical Review B, v. 104, n. 5, AUG 25 2021. (17/20976-3)

VIZARIM, N. P.; SOUZA, J. C. BELLIZOTTI; REICHHARDT, C. J. O.; REICHHARDT, C.; MILOSEVIC, M. V.; VENEGAS, P. A.. Soliton motion in skyrmion chains: Stabilization and guidance by nanoengineered pinning. PHYSICAL REVIEW B, v. 105, n. 22, p. 12-pg., 2022-06-16. (21/04941-0, 17/20976-3)

VIZARIM, N. P.; BELLIZOTTI SOUZA, J. C.; REICHHARDT, C.; REICHHARDT, C. J. O.; VENEGAS, P. A.. Directional locking and the influence of obstacle density on skyrmion dynamics in triangular and honeycomb arrays. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 33, n. 30, JUL 28 2021. (17/20976-3)

BELLIZOTTI SOUZA, J. C.; VIZARIM, N. P.; REICHHARDT, C. J. O.; REICHHARDT, C.; VENEGAS, P. A.. Clogging, diode and collective effects of skyrmions in funnel geometries. NEW JOURNAL OF PHYSICS, v. 24, n. 10, p. 14-pg., 2022-10-01. (21/04941-0, 17/20976-3)

SOUZA, J. C. BELLIZOTTI; VIZARIM, N. P.; REICHHARDT, C. J. O.; REICHHARDT, C.; VENEGAS, P. A.. Magnus induced diode effect for skyrmions in channels with periodic potentials. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 35, n. 1, p. 10-pg., 2023-01-11. (17/20976-3, 21/04941-0)

BELLIZOTTI SOUZA, J. C.; VIZARIM, N. P.; REICHHARDT, C. J. O.; REICHHARDT, C.; VENEGAS, P. A.. Spontaneous skyrmion conformal lattice and transverse motion during dc and ac compression. NEW JOURNAL OF PHYSICS, v. 25, n. 5, p. 15-pg., 2023-05-01. (17/20976-3, 21/04941-0)