Affiliation:
1. School of Physics and Optoelectronic Engineering Anhui University 230601 Hefei China
2. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory HFIPS Anhui Chinese Academy of Sciences Hefei 230031 China
3. School of Physics and Materials Engineering Hefei Normal University Hefei 230601 China
4. Anhui Key Laboratory of Magnetic Functional Materials and Devices School of Materials Science and Engineering Anhui University 230601 Hefei China
Abstract
AbstractMagnetic skyrmions are spin swirls that possess topological nontriviality and are considered particle‐like entities. They are distinguished by an integer topological charge Q. The presence of skyrmion bundles provides an opportunity to explore the range of values for Q, which is crucial for the advancement of topological spintronic devices with multi‐Q properties. In this study, a new material candidate, Sr2Co2Fe28O46 hexaferrite of the X‐type, which hosts small dipolar skyrmions at room temperature and above is presented. By exploiting reversed magnetic fields from metastable skyrmion bubbles at zero fields, skyrmion‐bubble bundles with different interior skyrmion/bubble numbers, topological charges, and morphologies at room temperature are incorporated. These experimental findings are consistently supported by micromagnetic simulations. These results highlight the versatility of topological spin textures in centrosymmetric uniaxial magnets, thereby paving the way for the development of room‐temperature topological spintronic devices with multi‐Q characteristics.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Natural Science Foundation of Anhui Province
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science