论文标题
MNSI-XALX和Fe1-Ycoysi的Skyrmion晶格阶段的熵签名
Entropic signatures of the skyrmion lattice phase in MnSi1-xAlx and Fe1-yCoySi
论文作者
论文摘要
通过低场磁化和AC易感性测量，研究了Skyrmion晶格宿主化合物MNSI0.962AL0.038和FE0.7CO0.3SI中磁相变的熵特征。这些数据表明，在MNSI0.962AL0.038中应用磁场的锥形到天空转变的特征是磁熵在一阶拓扑相变的预期中明显不连续性。由于化学替代障碍的水平和自旋动力学（范围和时间尺度）的差异，因此，在等速度FE0.7CO0.3SI中，这些相同的磁凝性特征在等值0.7CO0.3SI中忽略不计。尽管这两种化合物的磁性结构有明显的相似性，但这些相之间的过渡实际上是不同的，这表明这类材料中的磁相跃迁具有令人惊讶的非宇宙性。
The entropic signatures of magnetic phase transitions in the skyrmion lattice host compounds MnSi0.962Al0.038 and Fe0.7Co0.3Si were investigated through low field magnetization and ac susceptibility measurements. These data indicate that the conical to skyrmion transition that occurs with the application of magnetic field in MnSi0.962Al0.038 is characterized by clear discontinuity in the magnetic entropy as expected for first order topological phase transition. These same magnetoentropic features are negligibly small in isostructural Fe0.7Co0.3Si due to the level of chemical substitution related disorder and differences in the spin dynamics (range and timescales). Despite the obvious similarities in the magnetic structures of these two compounds, the transitions between these phases is substantially different indicating a surprising non-universality to the magnetic phase transitions in this class of materials.
