Bloch points in nanostrips

Abstract

Complex magnetic materials hosting topologically non-trivial particle-like objects such as skyrmions are under intensive research and could fundamentally change the way we store and process data. One important class of materials are helimagnetic materials with Dzyaloshinskii-Moriya interaction. Recently, it was demonstrated that nanodisks consisting of two layers with opposite chirality can host a single stable Bloch point of two different types at the interface between the layers. Using micromagnetic simulations we show that FeGe nanostrips consisting of two layers with opposite chirality can host multiple coexisting Bloch points in an arbitrary combination of the two different types. We show that the number of Bloch points that can simultaneously coexist depends on the strip geometry and the type of the individual Bloch points. Our simulation results allow us to predict strip geometries suitable for an arbitrary number of Bloch points. We show an example of an 80-Bloch-point configuration verifying the prediction.

12 pages, 6 figures, and 2 pages and 3 figures supplement

References in corpus (3)

• Ubermag: Towards more effective micromagnetic workflows
• User interfaces for computational science: a domain specific language for OOMMF embedded in Python
• Bloch points in nanostrips

Cited by in corpus (5)

• Bloch points in nanostrips
• Frustration-driven topological textures on the honeycomb lattice: antiferromagnetic meron-antimeron and skyrmion crystals emerging from spiral spin liquids
• Controlling stable Bloch points with electric currents
• Regularized Micromagnetic Theory for Bloch Points
• Simulating Bloch points using micromagnetic and Heisenberg models