Bimeron nanoconfined design

TL;DR

This paper demonstrates how confined geometries, especially rhombic plaquettes, can stabilize topological bimeron excitations in ferromagnetic materials with Dzyaloshinskii-Moriya interaction, enabling control over skyrmion-bimeron phases.

Contribution

It introduces a novel approach to stabilize and control bimeron excitations using specific confined geometries and vacancy grids in ferromagnetic systems.

Findings

Rhombic plaquettes stabilize bimeron excitations.

Vacancy grids influence topological excitation formation.

Bimerons can be stabilized without magnetic fields.

Abstract

We report on the stabilization of the topological bimeron excitations in confined geometries. The Monte Carlo simulations for a ferromagnet with a strong Dzyaloshinskii-Moriya interaction revealed the formation of a mixed skyrmion-bimeron phase. The vacancy grid created in the spin lattice drastically changes the picture of the topological excitations and allows one to choose between the formation of a pure bimeron and skyrmion lattice. We found that the rhombic plaquette provides a natural environment for stabilization of the bimeron excitations. Such a rhombic geometry can protect the topological state even in the absence of the magnetic field.