A new class of chiral materials hosting magnetic skyrmions beyond room temperature

Abstract

Skyrmions, topologically protected vortex-like nanometric spin textures in magnets, have been attracting increasing attention for emergent electromagnetic responses and possible technological applications for spintronics. In particular, metallic magnets with chiral and cubic/tetragonal crystal structure may have high potential to host skyrmions that can be driven by low electrical current excitation. However, experimental observations of skyrmions have so far been limited to below room temperature for the metallic chiral magnets, specifically for the MnSi-type B20 compounds. Toward technological applications, it is crucial to transcend this limitation. Here we demonstrate the formation of skyrmions with unique spin helicity both at and above room temperature in a family of cubic chiral magnets: beta-Mn-type Co-Zn-Mn alloys with a different chiral space group from that of B20 compounds. Lorentz transmission electron microscopy (LTEM), magnetization, and small angle neutron scattering (SANS) measurements unambiguously reveal the formation of a skyrmion crystal under the application of magnetic field (H<~1 kOe) in both thin- plate (thickness<150 nm) and bulk forms.

17 pages, 4 figures

References in corpus (4)

• Theory of current-driven motion of Skyrmions and spirals in helical magnets
• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Rotating skyrmion lattices by spin torques and field or temperature gradients
• Electric field-induced Skyrmion distortion and giant lattice rotation in the magnetoelectric insulator Cu2OSeO3

Cited by in corpus (135)

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• Direct imaging of a zero-field target skyrmion and its polarity switch in a chiral magnetic nanodisk
• Statics and Dynamics of Skyrmions Interacting with Pinning: A Review
• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Néel-type skyrmion lattice in tetragonal polar magnet VOSe${}_2$O${}_5$
• Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe
• Observation of two independent skyrmion phases in a chiral magnetic material
• Electrical manipulation of skyrmions in a chiral magnet
• Room-temperature antiskyrmions and sawtooth surface textures in a noncentrosymmetric magnet with $S_4$ symmetry
• Topological spin crystals by itinerant frustration
• Anomalous Hall resistivity and possible topological Hall effect in the EuAl${}_4$ antiferromagnet
• Zoology of multiple-Q spin textures in a centrosymmetric tetragonal magnet with itinerant electrons
• Direct visualization of three-dimensional shape of skyrmion strings in a noncentrosymmetric magnet
• Skyrmion formation in a bulk chiral magnet at zero magnetic field and above room temperature
• Multi-step topological transitions among meron and skyrmion crystals in a centrosymmetric magnet
• Degeneracy Lifting of Néel, Bloch, and Anti-Skyrmion Crystals in Centrosymmetric Tetragonal Systems
• Symmetry breaking, slow relaxation dynamics, and topological defects at the field-induced helix reorientation in MnSi
• Spin-wave spectroscopy on Dzyaloshinskii-Moriya interaction in room-temperature chiral magnets hosting skyrmions
• Metastable skyrmion lattices governed by magnetic disorder and anisotropy in $\beta$-Mn-type chiral magnets
• Effective spin model in momentum space: Toward a systematic understanding of multiple-$Q$ instability by momentum-resolved anisotropic exchange interactions
• Detection of antiskyrmions by topological Hall effect in Heusler compounds
• Deciphering structural and magnetic disorder in the chiral skyrmion host materials Co${}_x$Zn${}_y$Mn${}_z$ ($x+y+z=20$)
• Skyrmion crystal and spiral phases in centrosymmetric bilayer magnets with staggered Dzyaloshinskii-Moriya interaction
• Thermodynamic evidence of a second skyrmion lattice phase and tilted conical phase in Cu${}_2$0SeO${}_3$
• Spin order and fluctuations in the EuAl${}_4$ and EuGa${}_4$ topological antiferromagnets: A $\mu$SR study
• Doping control of magnetic anisotropy for stable antiskyrmion formation in schreibersite (Fe,Ni)${}_3$P with $S_4$ symmetry
• Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures
• Helicity locking of square skyrmion crystal in a centrosymmetric lattice system without vertical mirror symmetry
• Microwave spectroscopy of the low-temperature skyrmion state in Cu2OSeO3
• Reversible Vector Ratchets for Skyrmion Systems
• Element-specific soft X-ray spectroscopy, scattering and imaging studies of skyrmion-hosting compound Co${}_8$Zn${}_8$Mn${}_4$
• Rectangular and square skyrmion crystals on a centrosymmetric square lattice with easy-axis anisotropy
• Hedgehog-lattice spin texture in classical Heisenberg antiferromagnets on the breathing pyrochlore lattice
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Reorientations, relaxations, metastabilities and multidomains of skyrmion lattices
• Rhombic skyrmion lattice coupled with orthorhombic structural distortion in EuAl${}_4$
• Quantum oscillations in a centrosymmetric skyrmion-hosting magnet GdRu2Si2
• Complex magnetic phases enriched by charge density waves in topological semimetals GdSb_xTe_{2-x-δ}
• Nano-to-micro spatiotemporal imaging of magnetic skyrmion's life cycle
• Observation of Topological Hall Effect and Signature of Room Temperature Antiskyrmions in Mn-Ni-Ga D2d Heusler magnets
• Weak crystallization of fluctuating skyrmion textures in MnSi
• Tunable room temperature magnetic skyrmions in centrosymmetric kagome magnet Mn${}_4$Ga${}_2$Sn
• Positron spectroscopy of point defects in the skyrmion-lattice compound MnSi
• Skyrmions in antiferromagnets: thermal stability and the effect of external field and impurities
• Phase transitions between helices, vortices, and hedgehogs driven by spatial anisotropy in chiral magnets
• Giant magnetoresistance and topological Hall effect in the EuGa4 antiferromagnet
• Field-temperature phase diagram of magnetic bubbles spanning charge$/$orbital ordered and metallic phases in La${}_{1-x}$Sr${}_x$MnO${}_3$ ($x=0.125$)
• Exploring the origins of the Dzyalloshinski-Moria interaction in MnSi
• Measuring the Formation Energy Barrier of Skyrmions in Zinc Substituted Cu${}_2$OSeO${}_3$
• Rashba-Zener mechanism for nanoscale skyrmions and topological metals
• Topological phase transition driven by magnetic field and topological Hall effect in an antiferromagnetic skyrmion lattice
• Triple-meron crystal in high-spin Kitaev magnets
• Mapping Skyrmion Stability in Uniaxial Lacunar Spinel Magnets from First-Principles
• Orientation dependent current-induced motion of skyrmions with various topologies
• Stability of Néel-type skyrmion lattice against oblique magnetic fields in GaV${}_4$S${}_8$ and GaV${}_4$Se${}_8$
• Imaging and manipulation of skyrmion lattice domains in Cu2OSeO3
• Guided Skyrmion Motion Along Pinning Array Interfaces
• Skyrmion-Bubble Bundles in an X-type Sr2Co2Fe28O46 Hexaferrite above Room Temperature
• A hierarchy of multi-moment skyrmion phases in twisted magnetic bilayers
• Field and anisotropy driven transformations of spin spirals in cubic skyrmion hosts
• Spin excitations in the skymion host Cu2OSeO3
• Square skyrmion crystal in centrosymmetric systems with locally inversion-asymmetric layers
• Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
• Controlling Dzyaloshinskii-Moriya interactions in the skyrmion host candidates FePd${}_{1-x}$Pt${}_x$Mo${}_3$N
• Anisotropic fractal magnetic domain pattern in bulk Mn${}_{1.4}$PtSn
• Pseudogap and Fermi arc induced by Fermi surface nesting in a centrosymmetric skyrmion magnet
• Characterization of a Disordered Above Room Temperature Skyrmion Material Co8Zn8Mn4
• Frustration model and spin excitations in the helimagnet FeP
• Skyrmion Alignment and Pinning Effects in a Disordered Multi-Phase Skyrmion Material Co8Zn8Mn4
• Fundamental Theory of Current-Induced Motion of Magnetic Skyrmions
• Nonreciprocal Phonon Propagation in a Metallic Chiral Magnet
• Strong and tunable magnetoelectric coupling in 2D trilayer heterostructures
• Triple-$\mathcal{Q}$ partial magnetic orders induced by quadrupolar interactions: Triforce order scenario for UNi${}_4$B
• Collinear Rashba-Edelstein effect in non-magnetic chiral materials
• Persistent exchange splitting in a chiral helimagnet Cr1/3NbS2
• Emergent skyrmion-based chiral order in zero-field Heisenberg antiferromagnets on the breathing kagome lattice
• Potential Skyrmion Host Fe(IO3)3: Connecting Stereo-active Lone-Pair Electron Effects to the Dzyaloshinskii-Moriya Interaction
• Soft X-ray phase nano-microscopy of micrometre-thick magnets
• Helical magnetic order and Fermi surface nesting in non-centrosymmetric ScFeGe
• Giant enhancement of the skyrmion stability in a chemically strained helimagnet
• Anomalous electrical transport and magnetic skyrmions in Mn-tuned Co9Zn9Mn2 single crystals
• Magnetic properties and magnetic structure of the frustrated quasi-one-dimensional antiferromagnet SrCuTe${}_2$O${}_6$
• Pinning of Helimagnetic Phase Transitions in Zn-Substituted Skyrmion Host Cu${}_2$OSeO${}_3$
• Magnetoentropic mapping and computational modeling of cycloids and skyrmions in the lacunar spinels GaV${}_4$S${}_8$ and GaV${}_4$Se${}_8$
• Spin wave stiffness and damping in a frustrated chiral helimagnet Co${}_8$Zn${}_8$Mn${}_4$ as measured by small-angle neutron scattering
• Hedgehog lattice and field-induced chirality in breathing-pyrochlore Heisenberg antiferromagnets
• Critical Sample Aspect Ratio and Magnetic Field Dependence for Antiskyrmion Formation in Mn1.4PtSn Single-Crystals
• Experimental Evidence of a change of Exchange Anisotropy Sign with Temperature in Zn-Substituted Cu2OSeO3
• Controllable inter-skyrmion attractions and resulting skyrmion-lattice structures in two-dimensional chiral magnets with in-plane anisotropy
• Antichiral Ferromagnetism
• Nonreciprocal transport in a room-temperature chiral magnet
• Magnetic properties of the noncentrosymmetric tetragonal antiferromagnet EuPtSi${}_3$
• Skyrmions as quasiparticles: free energy and entropy
• Does carrier localization affect the anomalous Hall effect?
• Stabilization and helicity control of hybrid magnetic skyrmion
• Robust metastable skyrmions with tunable size in the chiral magnet FePtMo${}_3$N
• Chiral surface spin textures in Cu${}_2$OSeO${}_3$ unveiled by soft x-ray scattering in specular reflection geometry
• Skyrmion Sliding Switch in a 90-nm-Wide Nanostructured Chiral Magnet
• In-plane anisotropy of the single-$q$ and multiple-$q$ ordered phases in the antiferromagnetic metal CeRh${}_2$Si${}_2$ unveiled by the bulk measurements under uniaxial stress and neutron scattering
• Skyrmion crystal with integer and fractional skyrmion numbers in a nonsymmorphic lattice structure with the screw axis
• Topological phase transitions and Berry-phase hysteresis in exchange-coupled nanomagnets
• Structural Chirality of beta-Mn
• Topological melting of the metastable skyrmion lattice in the chiral magnet Co${}_9$Zn${}_9$Mn${}_2$
• Experimental progress in Eu(Al,Ga)${}_4$ topological antiferromagnets
• Zero-field miniature skyrmion crystal and chiral domain state in breathing-kagome antiferromagnets
• Surface pinning and triggered unwinding of skyrmions in a cubic chiral magnet
• Skyrmion Lattice Manipulation with Electric Currents and Thermal Gradients in MnSi
• Anisotropy-dependent decay of room temperature metastable skyrmions and a nascent double-$q$ spin texture in Co${}_8$Zn${}_9$Mn${}_3$
• Identifying magnetic antiskyrmions while they form with convolutional neural networks
• Short-wave magnons with multipole spin precession detected in the topological bands of a skyrmion lattice
• Vital role of anisotropy in cubic chiral skyrmion hosts
• X-ray holographic imaging of magnetic surface spirals in FeGe lamellae
• Anomalous magnetoentropic response of skrymion crystals
• Topological Hall effect in bulk ferromagnet Cr${}_2$Te${}_3$ embedded with black-phosphorus-like bismuth nanosheets
• Spin-orbit coupled Hubbard skyrmions
• Deterministic strain-control of stability and current-induced motion of skyrmions in chiral magnets
• Spontaneous chirality selection and nonreciprocal spin wave in breathing-kagome antiferromagnets at zero field
• Structure analysis of high-pressure phase for skyrmion-hosting multiferroic Cu2OSeO3
• Higher-order modulations in the skyrmion-lattice phase of Cu${}_2$OSeO${}_3$
• Inducing Skyrmion Flop Transitions in Co${}_8$Zn${}_8$Mn${}_4$ at Room Temperature
• Fixing Left and Right: Assignment of Chiral Elemental Crystal Structures using Kikuchi Diffraction
• Effective spin model with anisotropic exchange interactions for the spin-orbit coupled Hubbard model at half-filling
• Ferrimagnetic Skyrmions in a Tetragonal Mn1.9Co0.1Sb Single Crystal at Room Temperature
• Enhanced Curie temperature and room-temperature 50-nm skyrmions achieved in hexagonal ferromagnet Mn5Ge3+x synthesized via a high-pressure method
• Giant and robust topological Hall effect in Chiral Magnet Co7Zn8Mn5
• Helical spin dynamics in Cu${}_2$OSeO${}_3$ as measured with small-angle neutron scattering
• Strong Coupling between Propagating Magnons and High-order Gyrotropic Skyrmion Modes
• Simulating magnetic antiskyrmions on the lattice
• Manipulating the Topology of Nanoscale Skyrmion Bubbles by Spatially Geometric Confinement
• Noncentrosymmetric Nowotny Chimney Ladder Ferromagnet Cr4Ge7 with a High Curie Temperature of ~ 207 K
• MnSnTeO6: a Chiral Antiferromagnet Prepared by a Two-Step Topotactic Transformation
• Investigations of the size distribution and magnetic properties of nanoparticles of Cu${}_2$OSeO${}_3$