论文标题
MNSI中的Skyrmion晶格形成的拓扑障碍
Topological energy barrier for skyrmion lattice formation in MnSi
论文作者
论文摘要
我们通过手性磁铁MNSI的Skyrmion Grattice的磁滞来报告拓扑Skyrmion能量屏障的直接测量。使用带有定制的电阻线圈的小角度中子散射进行测量，以进行高精度的小磁滞回路。使用改编的Preisach模型分析了实验数据，以量化Skyrmion形成的能屏障，并通过基于原子自旋模拟的最小能量路径分析来证实。我们揭示了MNSI以锥形相形成的Skyrmion晶格逐渐在小域中，每个域都由数百个天空组成，并且具有几个EV的激活屏障。
We report the direct measurement of the topological skyrmion energy barrier through a hysteresis of the skyrmion lattice in the chiral magnet MnSi. Measurements were made using small-angle neutron scattering with a custom-built resistive coil to allow for high-precision minor hysteresis loops. The experimental data was analyzed using an adapted Preisach model to quantify the energy barrier for skyrmion formation and corroborated by the minimum-energy path analysis based on atomistic spin simulations. We reveal that the skyrmion lattice in MnSi forms from the conical phase progressively in small domains, each of which consisting of hundreds of skyrmions, and with an activation barrier of several eV.
