Self-organization of topological defects for a triangular-lattice magnetic dots array subject to a perpendicular magnetic field

TL;DR

This paper investigates how topological defects self-organize in a triangular-lattice array of magnetic dots under a perpendicular magnetic field, revealing complex magnetic structures and defect-driven magnetization processes.

Contribution

It introduces a detailed analysis of defect self-organization in magnetic dot arrays, highlighting the role of topological defects in magnetization under external fields.

Findings

Topological defects form and self-organize as magnetic field increases.

Antiferromagnetic order is observed at low fields due to dipole interactions.

Defect structures influence the magnetization process over a wide field range.

Abstract

The regular array of magnetic particles (magnetic dots) of the form of a two-dimensional triangular lattice in the presence of external magnetic field demonstrates complicated magnetic structures. The magnetic symmetry of the ground state for such a system is lower than that for the underlying lattice. Long range dipole-dipole interaction leads to a specific antiferromagnetic order in small fields, whereas a set of linear topological defects appears with the growth of the magnetic field. Self-organization of such defects determines the magnetization process for a system within a wide range of external magnetic fields.