论文标题
散装Mnniga和Mn $ _ {1.4} $ PT $ _ {0.9} $ PD $ _ {0.1} $ SN由Muon Spin放松调查
Spin dynamics in bulk MnNiGa and Mn$_{1.4}$Pt$_{0.9}$Pd$_{0.1}$Sn investigated by muon spin relaxation
论文作者
论文摘要
我们报告了MUON自旋放松和大量Mn $ _ {1.4} $ PT $ _ {0.9} $ PD $ _ {0.1} $ SN和MNNIGA的磁化测定研究mn $ _ {1.4} $ pt $ _ {0.9} $ pd $ _ {0.1} $ sn and biskyrmions for Mnniga），并在批量上显示自旋重新定位过渡。这些测量结果揭示了每种材料中两个磁相变的磁化动力学。特别是，我们证明，通过考虑温度的动力学频率降低，而不是急剧的临界速度减慢典型的二阶转变，可以理解这两个样品中较高温度转变的行为。此外，在低温下，这两个样品都显示出频率在旋转重新定制过渡以下的广泛频率上的旋转动力学。我们确定的动态行为给出了这些材料的大量磁性的新见解，这些材料可能有助于稳定在薄层中看到的拓扑非平凡相。
We report muon spin relaxation and magnetometry studies of bulk Mn$_{1.4}$Pt$_{0.9}$Pd$_{0.1}$Sn and MnNiGa, two materials which have recently been proposed to host topological magnetic states in thin lamella (antiskyrmions for Mn$_{1.4}$Pt$_{0.9}$Pd$_{0.1}$Sn and biskyrmions for MnNiGa), and show spin reorientation transitions in bulk. These measurements shed light on the magnetic dynamics surounding the two magnetic phase transitions in each material. In particular, we demonstrate that the behaviour approaching the higher temperature transition in both samples is best understood by considering a slow decrease in the frequency of dynamics with temperature, rather than the sharp critical slowing down typical of second order transitions. Furthermore, at low temperatures the two samples both show spin dynamics over a broad range of frequencies that persist below the spin reorienation transition. The dynamic behavior we identify gives new insight into the bulk magnetism of these materials that may help underpin the stabilization of the topologically non-trivial phases that are seen in thin lamellae.
