Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet

Abstract

Topological magnetic charge Q is a fundamental parameter that describes the magnetic domains and determines their intriguing electromagnetic properties. The ability to switch Q in a controlled way by electrical methods allows for flexible manipulation of electromagnetic behavior in future spintronic devices. Here we report the room-temperature current-controlled topological magnetic transformations between Q = -1 skyrmions and Q = 0 stripes or type-II bubbles in a kagome crystal Fe${}_3$Sn${}_2$. We show that the reproducible and reversible skyrmion-bubble and skyrmion-stripe transformations can be achieved by tuning the density of nanosecond pulsed current of the order of ~10${}^{10}$ A${}^{-2}$. Further numerical simulations suggest that spin-transfer torque combined with Joule thermal heating effects determine the current-induced topological magnetic transformations.

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Cited by in corpus (9)

• Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet
• Tunable room temperature magnetic skyrmions in centrosymmetric kagome magnet Mn${}_4$Ga${}_2$Sn
• Combined Magnetic Imaging and Anisotropic Magnetoresistance Detection of Dipolar Skyrmions
• Skyrmion-Bubble Bundles in an X-type Sr2Co2Fe28O46 Hexaferrite above Room Temperature
• Deterministic generation of skyrmions and antiskyrmions by electric current
• Observation of Hybrid Magnetic Skyrmion Bubbles in Fe3Sn2 Nanodisks
• Current-Controlled Skyrmion Number in Confined Ferromagnetic Nanostripes
• Spin order dependent skyrmion stabilization in MnFeCoGe hexagonal magnets
• Deterministic Electrical Control of Single Magnetic Bubbles in Nanostructured Cells