# Formation process of skyrmion lattice domain boundaries: The role of grain boundaries

## TL;DR

This study investigates how grain boundaries influence the formation of skyrmion lattice domain boundaries in FeGe, revealing that intersections of grains stabilize these boundaries, with simulations confirming their energetic favorability.

## Contribution

It provides new insights into the role of grain boundaries in skyrmion lattice domain boundary formation, combining microscopy observations with micromagnetic simulations.

## Key findings

- Grain boundaries and edges are crucial in stabilizing SkL domain boundaries.
- SkL domain boundaries are lowest energy configurations at grain intersections.
- Wide areas tend to form single SkL domains without boundaries.

## Abstract

We report on the formation process of skyrmion lattice (SkL) domain boundaries in FeGe using Lorentz transmission electron microscopy and small-angle electron diffraction. We observed that grain boundaries and edges play an important role in the formation of SkL domain boundaries; The SkL domain boundary is stabilized at the intersection of two grains. A micromagnetic simulation using the Landau-Lifshitz-Gilbert equation revealed that the SkL domains separated by a boundary represent the lowest energy configuration. Conversely, in a wide area, SkL domain boundaries were not formed and SkL domains with different orientations rotated to form a single SkL domain.

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Source: https://tomesphere.com/paper/1907.00774