Magnetostatic interaction between Bloch point nanospheres.

Autor: Zambrano-Rabanal C; Departamento de Ciencias Físicas, Universidad de La Frontera, Casilla 54-D, Temuco, Chile., Valderrama B; Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago, Chile., Tejo F; Escuela de Ingeniería, Universidad Central de Chile, Avda. Santa Isabel 1186, 8330601, Santiago, Chile., Elías RG; Departamento de Física, Universidad de Santiago de Chile (USACH), Avda. Víctor Jara 3493, Santiago, Chile., Nunez AS; Departamento de Física, FCFM, Universidad de Chile, Santiago, Chile.; Centro de nanociencia y nanotecnología CEDENNA, Avda. Ecuador 3493, Santiago, Chile., Carvalho-Santos VL; Departamento de Física, Universidade Federal de Viçosa, 36570-900, Viçosa, Brazil., Vidal-Silva N; Departamento de Ciencias Físicas, Universidad de La Frontera, Casilla 54-D, Temuco, Chile. nicolas.vidal@ufrontera.cl.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2023 May 03; Vol. 13 (1), pp. 7171. Date of Electronic Publication: 2023 May 03.
DOI: 10.1038/s41598-023-34167-y
Abstrakt: Three-dimensional topological textures have become a topic of intense interest in recent years. This work uses analytical and numerical calculations to determine the magnetostatic field produced by a Bloch point (BP) singularity confined in a magnetic nanosphere. It is observed that BPs hosted in a nanosphere generate magnetic fields with quadrupolar nature. This finding is interesting because it shows the possibility of obtaining quadrupole magnetic fields with just one magnetic particle, unlike other propositions considering arrays of magnetic elements to generate this kind of field. The obtained magnetostatic field allows us to determine the interaction between two BPs as a function of the relative orientation of their polarities and the distance between them. It is shown that depending on the rotation of one BP related to the other, the magnetostatic interaction varies in strength and character, being attractive or repulsive. The obtained results reveal that the BP interaction has a complex behavior beyond topological charge-mediated interaction.
(© 2023. The Author(s).)
Databáze: MEDLINE
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