Researchers Create New Magnetic Structures That Could Boost Data Storage
Scientists have engineered a two-layer magnetic material that produces complex, linked magnetic patterns with potential applications in next-generation data storage and processing. The breakthrough demonstrates how tuning the layers' interaction and external fields can create previously unreachable magnetic configurations, opening pathways for more efficient information devices.
Originaltitel: Linked skyrmions in shifted magnetic bilayer
Abstract Magnetic solitons have recently attracted significant attention due to their intricate physical properties and potential applications in information processing. The majority of the studies in this field, however, are focused on a particular type of solitons known as skyrmions, characterised by a unit topological charge. Here, we present a shifted magnetic bilayer that can demonstrate magnetic solitons with arbitrary large topological charges. These configurations, which we call linked skyrmions , consist of multiple skyrmions linked together with topological point defects. These topological point defects, termed as anti-aligned points, originate from the mutually orthogonal Dzyaloshinskii-Moriya interaction in two different layers. By tuning the interlayer exchange coupling and the external magnetic field, one can also achieve different ground states in this bilayer. Additionally, the system also demonstrates conventional skyrmion-bags and k π -skyrmions. Finally we propose a suitable material candidate where these magnetic configurations can be realised. Our findings, thus, can provide a way to achieve solitons with large topological charge and realise them in realistic systems.