Skyrmion-Bubble Bundles in an X-type Sr2Co2Fe28O46 Hexaferrite above Room Temperature

Abstract

Magnetic 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, we present a new material candidate, Sr2Co2Fe28O46 hexaferrite of the X-type, which hosts small dipolar skyrmions at room temperature and above. By exploiting reversed magnetic fields from metastable skyrmion bubbles at zero fields, we can incorporate skyrmion-bubble bundles with different interior skyrmion/bubble numbers, topological charges, and morphologies at room temperature. Our experimental findings are consistently supported by micromagnetic simulations. Our 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.

https://doi.org/10.1002/adma.202306117

References in corpus (16)

• Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles
• A new class of chiral materials hosting magnetic skyrmions beyond room temperature
• The 2020 Skyrmionics Roadmap
• Magnetic Skyrmion Bundles and Their Current-Driven Dynamics
• Tailoring magnetic energies to form dipole skyrmions and skyrmion lattices
• Room-temperature antiskyrmions and sawtooth surface textures in a noncentrosymmetric magnet with $S_4$ symmetry
• Skyrmionic Spin Structures in Layered Fe5GeTe2 Up To Room Temperature
• Two-dimensional characterization of three-dimensional magnetic bubbles in Fe${}_3$Sn${}_2$ nanostructures
• Magnetic particle-antiparticle creation and annihilation
• Dipolar-stabilized first and second-order antiskyrmions in ferrimagnetic multilayers
• Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet
• Tunable room temperature magnetic skyrmions in centrosymmetric kagome magnet Mn${}_4$Ga${}_2$Sn
• Magnetic skyrmion binning
• Formation mechanisms of magnetic bubbles in an M-type hexaferrite: the role of chirality reversals at domain walls
• Combined Magnetic Imaging and Anisotropic Magnetoresistance Detection of Dipolar Skyrmions
• Topological melting of the metastable skyrmion lattice in the chiral magnet Co${}_9$Zn${}_9$Mn${}_2$

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• Skyrmion Sliding Switch in a 90-nm-Wide Nanostructured Chiral Magnet
• Spin order dependent skyrmion stabilization in MnFeCoGe hexagonal magnets
• Deterministic Electrical Control of Single Magnetic Bubbles in Nanostructured Cells