论文标题
B20-MNGE的短期磁化纹理通过热波动的当地力矩解释
Short period magnetization texture of B20-MnGe explained by thermally fluctuating local moments
论文作者
论文摘要
B20型化合物，例如MNSI和FEGE，在中尺度上宿主的helimagnetic和Skyrmion阶段，通过典型地解释了铁磁相互作用与较弱的手性dzyaloshinskii-Moriya的组合。 MNGE神秘地逃避了这种范式，因为它以短得多的纳米尺度显示非共线磁态。在这里，我们表明，MNGE的长度尺度和体积依赖性磁性词根纯粹来自纯粹的各向同性交换相互作用，通常以顺磁状态获得。通过将MNGE与规范的B20-螺旋体FeGE进行比较来验证我们的方法。计算MNGE的自由能，从中我们可以从中显示三Q磁状态如何通过添加高阶相互作用来稳定。
B20-type compounds, such as MnSi and FeGe, host helimagnetic and skyrmion phases at the mesoscale, which are canonically explained by the combination of ferromagnetic isotropic interactions with weaker chiral Dzyaloshinskii-Moriya ones. Mysteriously, MnGe evades this paradigm as it displays a noncollinear magnetic state at a much shorter nanometer scale. Here we show that the length scale and volume-dependent magnetic properties of MnGe stem from purely isotropic exchange interactions, generally obtained in the paramagnetic state. Our approach is validated by comparing MnGe with the canonical B20-helimagnet FeGe. The free energy of MnGe is calculated, from which we show how triple-q magnetic states can stabilize by adding higher-order interactions.
