Dissipation processes in the insulating skyrmion compound Cu2OSeO3

Abstract

We present a detailed study of the phase diagram surrounding the skyrmion lattice (SkL) phase of Cu2OSe2O3 using high-precision magnetic ac susceptibility measurements. An extensive investigation of transition dynamics around the SkL phase using the imaginary component of the susceptibility revealed that at the conical-to-SkL transition a broad dissipation region exists with a complex frequency dependence. The analysis of the observed behavior within the SkL phase indicates a distribution of relaxation times intrinsically related to SkL. At the SkL-to-paramagnet transition a narrow first-order peak is found that exhibits a strong frequency and magnetic field dependence. Surprisingly, very similar dependence has been discovered for the first-order transition below the SkL phase, i.e. where the system enters the helical and conical state(s), indicating similar processes across the order-disorder transition.

arXiv commentAccepted for publication in PRB

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Cited by in corpus (21)

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• Dynamical magnetoelectric phenomena of multiferroic skyrmions
• Low-field anomalous magnetic phase in the kagome-lattice shandite Co3Sn2S2
• Chiral Bobbers and Skyrmions in Epitaxial FeGe/Si(111) Films
• Generic aspects of skyrmion lattices in chiral magnets
• Symmetry breaking, slow relaxation dynamics, and topological defects at the field-induced helix reorientation in MnSi
• History dependence of the magnetic properties of single-crystal Fe${}_{1-x}$Co${}_x$Si
• Dramatic pressure-driven enhancement of bulk skyrmion stability
• Increased lifetime of metastable skyrmions by doping
• Complex magnetic phases enriched by charge density waves in topological semimetals GdSb_xTe_{2-x-δ}
• Weak crystallization of fluctuating skyrmion textures in MnSi
• Thermal stability and irreversibility of skyrmion-lattice phases in Cu${}_2$OSeO${}_3$
• Magnetic field dependence of the nonlinear magnetic response and tricritical point in the monoaxial chiral helimagnet Cr${}_{1/3}$NbS${}_2$
• An ac-susceptibility study of magnetic relaxation phenomena in the antiskyrmion hosting tetragonal Mn-Pt(Pd)-Sn system
• Relaxation dynamics of modulated magnetic phases in skyrmion host GaV4S8: an ac magnetic susceptibility study
• Increasing the skyrmion stability in Cu${}_2$OSeO${}_3$ by chemical substitution
• Low energy magnon dynamics and magneto-optics of the skyrmionic Mott insulator Cu${}_2$OSeO${}_3$
• Pinning of Helimagnetic Phase Transitions in Zn-Substituted Skyrmion Host Cu${}_2$OSeO${}_3$
• Robust cycloid crossover driven by anisotropy in the skyrmion host GaV${}_4$S${}_8$
• Growth and helicity of non-centrosymmetric Cu${}_2$OSeO${}_3$ crystals