Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets

Abstract

Two centuries of research on phase transitions have repeatedly highlighted the importance of critical fluctuations that abound in the vicinity of a critical point. They are at the origin of scaling laws obeyed by thermodynamic observables close to second-order phase transitions resulting in the concept of universality classes, that is of paramount importance for the study of organizational principles of matter. Strikingly, in case such soft fluctuations are too abundant they may alter the nature of the phase transition profoundly; the system might evade the critical state altogether by undergoing a discontinuous first-order transition into the ordered phase. Fluctuation-induced first-order transitions have been discussed broadly and are germane for superconductors, liquid crystals, or phase transitions in the early universe, but clear experimental confirmations remain scarce. Our results from neutron scattering and thermodynamics on the model Dzyaloshinskii-Moriya (DM) helimagnet (HM) MnSi show that such a fluctuation-induced first-order transition is realized between its paramagnetic and HM state with remarkable agreement between experiment and a theory put forward by Brazovskii. While our study clarifies the nature of the HM phase transition in MnSi that has puzzled scientists for several decades, more importantly, our conclusions entirely based on symmetry arguments are also relevant for other DM-HMs with only weak cubic magnetic anisotropies. This is in particular noteworthy in light of a wide range of recent discoveries that show that DM helimagnetism is at the heart of problems such as topological magnetic order, multiferroics, and spintronics.

19 pages, 9 figures, 2 tables

References in corpus (22)

• Skyrmion Lattice in a Chiral Magnet
• Spontaneous Skyrmion Ground States in Magnetic Metals
• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Emergent electrodynamics of skyrmions in a chiral magnet
• Skyrmion Lattice in a Doped Semiconductor
• Electroweak Baryogenesis
• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Emergent superfluid crystals, frustration, and topologically defected states in multimode cavity QED
• Characteristic Crossing Points in Specific Heat Curves of Correlated Systems
• Metastability in Fluctuation Driven First-order Transitions: Nucleation of Lamellar Phases
• Single domain magnetic helicity and triangular chirality in structurally enantiopure Ba3NbFe3Si2O14
• Theory of helimagnons in itinerant quantum systems
• Single magnetic chirality in the magneto-electric NdFe${}_3$(${}^{11}$BO${}_3$)${}_4$
• Helimagnon Bands as Universal Spin Excitations of Chiral Magnets
• Universal phase structure of dilute Bose gases with Rashba spin-orbit coupling
• Magnetic anisotropy and low-energy spin waves in the Dzyaloshinskii-Moriya spiral magnet Ba_2 Cu Ge_2 O_7
• Magnetic Blue Phase in the Chiral Itinerant Magnet MnSi
• Chiral criticality in doped Mn${}_{1-y}$Fe${}_y$Si compounds
• Ultrasonic studies of the magnetic phase transition in MnSi
• Magnetic Fluctuations and Correlations in MnSi - Evidence for a Skyrmion Spin Liquid Phase
• Quantum phase transitions of magnetic rotons
• Nonlinear smectic elasticity of a helical state in cholesterics and helimagnets

Cited by in corpus (117)

• Metallic Quantum Ferromagnets
• The skyrmion lattice phase in three dimensional chiral magnets from Monte Carlo simulations
• Memory functions of magnetic skyrmions
• Specific heat of the skyrmion lattice phase and field-induced tricritical point in MnSi
• Formation of a topological non-Fermi liquid in MnSi
• Real-Space and Reciprocal-Space Berry Phases in the Hall Effect of Mn${}_{1-\mathrm{x}}$Fe${}_{\mathrm{x}}$Si
• Giant generic topological Hall resistivity of MnSi under pressure
• Frustration and quantum criticality
• Scattering mechanisms in textured FeGe thin films: magnetoresistance and the anomalous Hall effect
• Uniaxial pressure dependence of magnetic order in MnSi
• Quantum quasicrystals of spin-orbit coupled dipolar bosons
• Complex magnetic phase diagram and skyrmion lifetime in an ultrathin film from atomistic simulations
• Dynamical magnetoelectric phenomena of multiferroic skyrmions
• Interlayer exchange coupling -- a general scheme turning chiral magnets into magnetic multilayers carrying atomic-scale skyrmions
• Topological domain walls in helimagnets
• Generic aspects of skyrmion lattices in chiral magnets
• Local dynamics of topological magnetic defects in the itinerant helimagnet FeGe
• Dynamics and energetics of emergent magnetic monopoles in chiral magnets
• Symmetry breaking, slow relaxation dynamics, and topological defects at the field-induced helix reorientation in MnSi
• Isosbestic Points: Theory and Applications
• History dependence of the magnetic properties of single-crystal Fe${}_{1-x}$Co${}_x$Si
• B-T phase diagram of Pd/Fe/Ir(111) computed with parallel tempering Monte Carlo
• Topological magnon band structure of emergent Landau levels in a skyrmion lattice
• Magnetoentropic signatures of skyrmionic phase behavior in FeGe
• Band structure of helimagnons in MnSi resolved by inelastic neutron scattering
• Critical scaling in a cubic helimagnet Cu2OSeO3
• Deciphering structural and magnetic disorder in the chiral skyrmion host materials Co${}_x$Zn${}_y$Mn${}_z$ ($x+y+z=20$)
• Dramatic pressure-driven enhancement of bulk skyrmion stability
• Creation of a Chiral Bobber Lattice in Helimagnet-Multilayer Heterostructures
• Coupled quasimonopoles in chiral magnets
• Magnetic Fluctuations, Precursor Phenomena and Phase Transition in MnSi under Magnetic Field
• Dynamic electron correlations with charge order wavelength along all directions in the copper oxide plane
• A Raman study of the temperature and magnetic field dependence of electronic and lattice properties in MnSi
• Colloquium: Quantum skyrmionics
• Multiple phases with tricritical point and Lifshitz point in skyrmion host Cu${}_2$OSeO${}_3$
• Solid--liquid transition of skyrmions in a two-dimensional chiral magnet
• Comparative study of helimagnets MnSi and Cu2OSeO3 at high pressures
• Room-temperature skyrmion phase in bulk Cu2OSeO3 under high pressures
• The multi-purpose three-axis spectrometer (TAS) MIRA at FRM II
• Optically probing symmetry breaking in the chiral magnet Cu2OSeO3
• Cycloidally modulated magnetic order stabilized by thermal fluctuations in the Néel-type skyrmion host GaV${}_4$S${}_8$
• Magnetic ground state and spin fluctuations in MnGe chiral magnet as studied by Muon Spin Rotation
• Weak crystallization of fluctuating skyrmion textures in MnSi
• Magnetization and ac susceptibility study of the cubic chiral magnet Mn${}_{1-x}$Fe${}_x$Si
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• Valence-bond solids, vestigial order, and emergent SO(5) symmetry in a two-dimensional quantum magnet
• Positron spectroscopy of point defects in the skyrmion-lattice compound MnSi
• Inexhaustible physics of the helical magnet MnSi: field evolution of the magnetic phase transition inferred from ultrasound studies
• Dissipation processes in the insulating skyrmion compound Cu2OSeO3
• MIEZE Neutron Spin-Echo Spectroscopy of Strongly Correlated Electron Systems
• Kinetic small angle neutron scattering of the Skyrmion lattice in MnSi
• Composite Spin Crystal Phase in Antiferromagnetic Chiral Magnets
• Magnetic field dependence of the nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr${}_{1/3}$NbS${}_2$
• Chiral magnetic excitations in FeGe films
• Skyrmion lattice creep at ultra-low current densities
• Universality of the helimagnetic transition in cubic chiral magnets: Small angle neutron scattering and neutron spin echo spectroscopy studies of Fe${}_{1-x}$Co${}_x$Si
• Phase transitions in chiral magnets from Monte Carlo simulations
• Possible emergence of a skyrmion phase in ferroelectric GaMo${}_4$S${}_8$
• Evolution of magneto-crystalline anisotropies in Mn${}_{1-x}$Fe${}_x$Si and Mn${}_{1-x}$Co${}_x$Si as inferred from small-angle neutron scattering and bulk properties
• Spin-wave dynamics in FeGe helimagnet: studied by small-angle neutron scattering
• Critical spin-flip scattering at the helimagnetic transition of MnSi
• Skyrmions and spirals in MnSi under hydrostatic pressure
• Mapping Skyrmion Stability in Uniaxial Lacunar Spinel Magnets from First-Principles
• Evolution of helimagnetic correlations in Mn${}_{1-x}$Fe${}_x$Si with doping: a small-angle neutron scattering study
• Thermal expansion and magneto-volume studies of the itinerant helical magnet MnSi
• Ultra-High Resolution Neutron Spectroscopy of Low-Energy Spin Dynamics in UGe${}_2$
• Single helicity of the triple-$q$ triangular skyrmion lattice state in cubic chiral helimagnet EuPtSi
• Stability of skyrmion textures and the role of thermal fluctuations in cubic helimagnets: a new intermediate phase at low temperature
• Controlling Dzyaloshinskii-Moriya interactions in the skyrmion host candidates FePd${}_{1-x}$Pt${}_x$Mo${}_3$N
• Anisotropic magneto-crystalline coupling of the skyrmion lattice in MnSi
• Anomalous metamagnetism in the low carrier density Kondo lattice YbRh3Si7
• Versatile Strain-Tuning of Modulated Long-Period Magnetic Structures
• Evolution of ferromagnetic and non-Fermi liquid state with doping:the case of Ru doped UCoGe
• Quantum critical scaling in the disordered itinerant ferromagnet UCo${}_{1-x}$Fe${}_x$Ge
• Fragile balance of the exchange interactions in Mn${}_{1-x}$Co${}_x$Ge compounds
• Quantum phase transition, universality and scaling behaviors in the spin-1/2 Heisenberg model with ferromagnetic and antiferromagnetic competing interactions on honeycomb lattice
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• Emergence of a spin microemulsion in spin-orbit coupled Bose-Einstein condensates
• Dual nature of magnetism in MnSi
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• Evidence of a first-order smectic -- hexatic transition and its proximity to tricritical point in smectic films
• Finsler geometry modeling and Monte Carlo study of skyrmion shape deformation by uniaxial stress
• Dipolar effects on the critical fluctuations in Fe: Investigation by MIEZE
• Formation of incommensurate long-range magnetic order in the Dzyaloshinskii-Moriya antiferromagnet Ba${}_2$CuGe${}_2$O${}_7$ studied by neutron diffraction
• Thermal fluctuations in the conical state of monoaxial helimagnets
• Versatile module for experiments with focussing neutron guides
• Onset of a skyrmion phase by chemical substitution in MnGe chiral magnet
• Frustrated charge density wave and quasi-long-range bond-orientational order in the magnetic kagome FeGe
• Infinite critical boson non-Fermi liquid
• Stability of the skyrmion lattice near the critical temperature in cubic helimagnets
• Topological energy barrier for skyrmion lattice formation in MnSi
• Bond disorder enhances the information transfer in polar flock
• Evolution of Helimagnetic Correlations when approaching the Quantum Critical Point of Mn${}_{1-x}$Fe${}_x$Si
• Magnetic Single Domain State of the Monochiral Helimagnet MnSi in Zero Field Limit: Magnetic Properties Study
• Anomalous helimagnetic domain shrinkage due to the weakening of Dzyaloshinskii-Moriya interaction in CrAs
• Fluctuation-Induced Bistability of Fermionic Atoms Coupled to a Dissipative Cavity
• Exceptionally Slow, Long Range, and Non-Gaussian Critical Fluctuations Dominate the Charge Density Wave Transition
• Monte Carlo modeling the phase diagram of magnets with the Dzyaloshinskii - Moriya interaction
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• Physical properties of (Mn,Co)Si
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• Cubic magnetic anisotropy in $B$20 magnets: Interplay of anisotropy and magnetic order in Fe${}_{1-x}$Co${}_x$Si