Dissipation processes in the insulating skyrmion compound Cu2OSeO3 (CROSBI ID 232742)
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Podaci o odgovornosti
Levatić, Ivana ; Šurija, Vinko ; Berger, Helmuth ; Živković, Ivica
engleski
Dissipation processes in the insulating skyrmion compound Cu2OSeO3
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.
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Podaci o izdanju
90 (22)
2014.
224412-1-224412-9
objavljeno
1098-0121
10.1103/PhysRevB.90.224412