Controlling spin textures of magnetic nanodots using an antidot matrix
Year: 2025
Type: article
Abstract: We present a study of the magnetic properties of circular nanodots placed inside or in the vicinity of a circular hole in the perpendicularly magnetized antidot matrix. Micromagnetic simulations were performed to investigate the remanent magnetization configurations of the nanodots as a function of their vertical position relative to the matrix. The results demonstrate that the strength of the radial component of antidot matrix stray fields varies significantly along the vertical coordinate. This change influences the remanent state of nanodots, leading, depending on their location, to the stabilization of several magnetization configurations: radial vortex, curled vortex, or single-domain state. It was found that placing the dot at few nanometers below or above the matrix allows to stabilize the vortex state for a nanodot with the smallest diameter. This result provides a hint to tailor the magnetic properties of nanodots for their applications in spintronic and magnonic devices.
Source: Low Temperature Physics
DOI: 10.1063/10.0038648
Institutions: Universidade do Porto, Instituto de Física de Materiais Avançados, Nanotecnologia e Fotónica, O.Ya. Usikov Institute for Radiophysics and Electronics, Brno University of Technology, National Academy of Sciences of Ukraine, Institute of Magnetism, Adam Mickiewicz University in Poznań, Ikerbasque, University of the Basque Country
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: European Commission
Award: MSCA4Ukraine
OpenAlex ID: W4412992122