Critical scaling in a cubic helimagnet Cu2OSeO3

Abstract

We present a detailed AC susceptibility investigation of the fluctuation regime in the insulating cubic helimagnet Cu2OSeO3. For magnetic fields mu_0 H >= 200 mT, and over a wide temperature range, the system behaves according to the scaling relations characteristic of the classical 3D Heisenberg model. For lower magnetic fields the scaling is preserved only at higher T, and becomes renormalized in a narrow T range above the transition temperature. Contrary to the well-studied case of MnSi, where the renormalization has been interpreted within the Brazovskii theory, our analysis of the renormalization at H = 0 shows the fluctuation regime in Cu2OSeO3 to lie closer to that expected within the Wilson-Fischer scenario.

accepted for publication in PRB Rapid

References in corpus (4)

• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets
• Strong Dzyaloshinskii-Moriya Interaction and Origin of Ferroelectricity in Cu2OSeO3
• Chiral criticality in doped Mn${}_{1-y}$Fe${}_y$Si compounds

Cited by in corpus (21)

• Three-dimensional magnetic critical behavior in CrI${}_3$
• Dynamical magnetoelectric phenomena of multiferroic skyrmions
• Generic aspects of skyrmion lattices in chiral magnets
• Tricritical point and phase diagram based on critical scaling in monoaxial chiral helimagnet Cr1/3NbS2
• Magnetoelectric effects in the skyrmion host material Cu2OSeO3
• Magnetic relaxation phenomena in the Chiral Magnet Fe${}_{1-x}$Co${}_x$Si: An ac susceptibility study
• Magnetic Fluctuations, Precursor Phenomena and Phase Transition in MnSi under Magnetic Field
• Scaling Study and Thermodynamic Properties of the cubic Helimagnet FeGe
• Optically probing symmetry breaking in the chiral magnet Cu2OSeO3
• Magnetization and ac susceptibility study of the cubic chiral magnet Mn${}_{1-x}$Fe${}_x$Si
• Screw dislocations in cubic chiral magnets
• Dissipation processes in the insulating skyrmion compound Cu2OSeO3
• Magnetic field dependence of the nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr${}_{1/3}$NbS${}_2$
• 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
• 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
• Critical spin-flip scattering at the helimagnetic transition of MnSi
• Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
• Stability and Metastability of Skyrmions in Thin Lamellae of Cu${}_2$OSeO${}_3$
• Formation of incommensurate long-range magnetic order in the Dzyaloshinskii-Moriya antiferromagnet Ba${}_2$CuGe${}_2$O${}_7$ studied by neutron diffraction
• Low energy magnon dynamics and magneto-optics of the skyrmionic Mott insulator Cu${}_2$OSeO${}_3$
• Monte Carlo modeling the phase diagram of magnets with the Dzyaloshinskii - Moriya interaction