Micromagnetic simulations of magnetization reversal in kagome artificial spin ice
| Autor: | Kleber R. Pirota, Breno Malvezzi Cecchi, Murilo Ferreira Velo |
|---|---|
| Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Work (thermodynamics) Total internal reflection Condensed matter physics Magnetic moment Dirac (video compression format) Transição de fase Magnetism 02 engineering and technology Surface finish Metamateriais Edge (geometry) Magnetismo 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Spin ice Metamaterials 0103 physical sciences Artigo original 010306 general physics 0210 nano-technology Phase transition |
| Zdroj: | Repositório Institucional da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP Repositório da Produção Científica e Intelectual da Unicamp |
| Popis: | This work reports micromagnetic simulations used to study magnetization reversal in kagome artificial spin ice, taking into account the actual edge imperfections presented by the magnetic nanoislands as a source of disorder. An important advantage of the micromagnetic approach is to discretize a magnetic element in nanometric domains, allowing access to the sample magnetic moments distribution in detail. The limit case of zero disorder is accessed considering a system composed of perfect magnetic islands. The main result is the prediction of a critical angle between the applied magnetic field and the direction of one of the sublattices, above which Dirac strings emerge. For lower values, the reversal occurs through a bidimensional fashion, being smooth or abrupt depending on whether or not roughness is present, respectively. Finally, our simulations open the question of how the contour imperfections really influence the magnetic response of artificial spin ice CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP Fechado |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|