Exploiting symmetries in skyrmionic micromagnetic simulations : cylindrical and radial meshes
Castell-Queralt, Josep (Universitat Autònoma de Barcelona. Departament de Física)
González-Gómez, Leonardo (Universitat Autònoma de Barcelona. Departament de Física)
Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física)
Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física)

Date:	2022
Description:	7 pàg.
Abstract:	Micromagnetic simulations are an essential tool in the theoretical study of magnetic skyrmions. When confined into nanometric samples, these structures can serve as bits of information among other possible applications. Accurate simulations are one of the major sources of theoretical results. In the case of confined skyrmions, it is known that the boundaries play a critical role in their stabilization. However, most of the micromagnetic simulations are done using a finite-difference method with quadrilateral meshes, that do not exactly fit the boundaries. The use of this mesh can introduce a significant numerical error that can completely change the results of the simulations. We present here two different finite-difference meshes to study skyrmions in confined disks, taking advantage of the symmetry of that geometry. A two-dimensional cylindrical mesh for non-symmetric scenarios but geometrically symmetric (boundary conditions) that reduces the propagation of the numerical error, and the particular case of a one dimensional mesh for axisymmetric scenarios where the computation time is hugely reduced.
Grants:	Agencia Estatal de Investigación PID2019-104670GB-I00 Ministerio de Ciencia e Innovación FPU17/01970 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-105
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Micromagnetism ; Skyrmions ; Simulation
Published in:	Journal of magnetism and magnetic materials, Vol. 549 (2022) , art. 168972, ISSN 0304-8853

DOI: 10.1016/j.jmmm.2021.168972

7 p, 2.2 MB

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