Bloch points and topological dipoles observed by X-ray vector magnetic tomography in a ferromagnetic microstructure

Abstract

It is established that topological spin textures are a rich source for emergent physical properties; it remains a major challenge, however, to unravel their local structure and topological connections. Here, the authors apply X-ray vector magnetic tomography to gain insight into the magnetic structure near Bloch points at permalloy microstructures and identify several topological monopoles and dipoles within the domain wall core.