Probe of skyrmion phases and dynamics in MnSi via the magnetoelectric effect in a composite configuration
Yisheng Chai, Peipei Lu, Haifeng Du, Jianxin Shen, Yinina Ma, Kun Zhai, Le Wang, Youguo Shi, Hang Li, Wenhong Wang, Young Sun
Abstract
We have developed a sensitive technique to probe the magnetic skyrmion phases and dynamics by employing the interfacial coupling effect in a magnetoelectric composite configuration. The study on a MnSi single crystal sample using this technique provides clear evidence for the skyrmion lattice phase and coexistence of skyrmion and conical phase. Above the Curie temperature ${T}_{\mathrm{C}}$, a region with strong spin fluctuation is revealed as well. By tuning the density of skyrmion or disorder, a transition from the skyrmion lattice to skyrmion-conical coexisting phase is observed. The observation is in good agreement with a theoretical model which predicts the dissipation behavior in the coexistence phase.