STUDY OF THE DYNAMIC BEHAVIOR OF A SKYRMION IN A FERROMAGNETIC THIN FILM UNDER THE INFLUENCE OF A DEFECTS NETWORK WITH SQUARE SYMMETRY AT NULL TEMPERATURE

• Grant number: 24/21139-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: February 01, 2025
• End date: January 31, 2026
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Pablo Antonio Venegas Urenda
• Grantee: Lucas Basseto
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil

Abstract

Skyrmions are quasi-particles proposed theoretically by the English physicist Tony Skyrme in 1960 for stabilizing hadrons as quantized topological defects. The idea of ¿¿the skyrmion as a magnetic texture was proposed in theoretical form in 1989, and confirmed experimentally only in 2009 in MnSi. Some of the most interesting characteristics of skyrmions are their nanometric size, topological stability, and the ability to move at low values ¿¿of polarized spin current. These three factors together make them excellent candidates for applications in spintronics. Understanding and controlling the dynamics of these magnetic textures is crucial for future technological applications. In the context of this project, the dynamic behavior of skyrmions in a ferromagnetic thin film that supports these structures will be investigated, in the presence of periodic networks of trapping centers at zero temperature. Through the particle model combined with Molecular Dynamics techniques, we will simulate the dynamic behavior of skyrmions in a two-dimensional chiral magnet. We consider a square array of defects, where part of the defects attract skyrmions while the other part repels them. Our goal is to explore the possibilities of controlling the motion of skyrmions through this network of defects. We hope that the results obtained can contribute significantly to the advancement of the understanding of skyrmion dynamics, in addition to providing means for the development of spintronic devices based on these magnetic textures.