Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature

Abstract

We report that in a $\beta$-Mn-type chiral magnet Co${}_9$Zn${}_9$Mn${}_2$, skyrmions are realized as a metastable state over a wide temperature range, including room temperature, via field-cooling through the thermodynamic equilibrium skyrmion phase that exists below a transition temperature $T_{\mathrm{c}}$ $\sim$ 400 K. The once-created metastable skyrmions survive at zero magnetic field both at and above room temperature. Such robust skyrmions in a wide temperature and magnetic field region demonstrate the key role of topology, and provide a significant step toward technological applications of skyrmions in bulk chiral magnets.

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Cited by in corpus (34)

• The 2020 Skyrmionics Roadmap
• Metastable skyrmion lattices governed by magnetic disorder and anisotropy in $\beta$-Mn-type chiral magnets
• Non-Abelian fractionalization in topological minibands
• Deciphering structural and magnetic disorder in the chiral skyrmion host materials Co${}_x$Zn${}_y$Mn${}_z$ ($x+y+z=20$)
• Increased lifetime of metastable skyrmions by doping
• Realization of Ordered Magnetic Skyrmions in Thin Films at Ambient Conditions
• Giant proximity exchange and flat Chern band in 2D magnet-semiconductor heterostructures
• Mechanisms of skyrmion and skyrmion crystal formation from the conical phase
• Electric field-driven topological phase switching and skyrmion lattice metastability in magnetoelectric Cu${}_2$OSeO${}_3$
• Nano-to-micro spatiotemporal imaging of magnetic skyrmion's life cycle
• A theory of skyrmion crystal formation
• Ferromagnetic resonance with magnetic phase selectivity by means of resonant elastic x-ray scattering on a chiral magnet
• Three-Dimensional Structure of Hybrid Magnetic Skyrmions Determined by Neutron Scattering
• Controlling Dzyaloshinskii-Moriya interactions in the skyrmion host candidates FePd${}_{1-x}$Pt${}_x$Mo${}_3$N
• Deterministic generation of skyrmions and antiskyrmions by electric current
• Anisotropic fractal magnetic domain pattern in bulk Mn${}_{1.4}$PtSn
• Fundamental Theory of Current-Induced Motion of Magnetic Skyrmions
• Nonreciprocal Phonon Propagation in a Metallic Chiral Magnet
• Metastable solitonic states in the strained itinerant helimagnet FeGe
• Spin structure relation to phase contrast imaging of isolated magnetic Bloch and Neel skyrmions
• Zero-field Skyrmions with a High Topological Number in Itinerant Magnets
• Pinning of Helimagnetic Phase Transitions in Zn-Substituted Skyrmion Host Cu${}_2$OSeO${}_3$
• Spin wave stiffness and damping in a frustrated chiral helimagnet Co${}_8$Zn${}_8$Mn${}_4$ as measured by small-angle neutron scattering
• Controllable inter-skyrmion attractions and resulting skyrmion-lattice structures in two-dimensional chiral magnets with in-plane anisotropy
• Topological energy barrier for skyrmion lattice formation in MnSi
• Robust metastable skyrmions with tunable size in the chiral magnet FePtMo${}_3$N
• Topological melting of the metastable skyrmion lattice in the chiral magnet Co${}_9$Zn${}_9$Mn${}_2$
• From the spin eigenmodes of isolated Néel skyrmions to the magnonic bands of a skyrmionic crystal: a micromagnetic study as a function of the strength of both the interfacial Dzyaloshinskii-Moriya and the exchange constants
• Skyrmions at Vanishingly Small Dzyaloshinskii-Moriya Interaction or Zero Magnetic Field
• Surface pinning and triggered unwinding of skyrmions in a cubic chiral magnet
• Metaheuristic conditional neural network for harvesting skyrmionic metastable states
• Anisotropy-dependent decay of room temperature metastable skyrmions and a nascent double-$q$ spin texture in Co${}_8$Zn${}_9$Mn${}_3$
• Observation of magnetic skyrmion lattice in Cr${}_{0.82}$Mn${}_{0.18}$Ge by small-angle neutron scattering
• Orbital Description of Landau Levels