稀土金属间化合物$R$Mn$_2$Ge$_2$（$R$=Ce、Pr、Nd）的局域磁性质
Local magnetic properties of the rare-earth intermetallics $R$Mn$_2$Ge$_2$ ($R$=Ce, Pr, Nd)
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中文总结 AI 辅助
本文研究$R$Mn$_2$Ge$_2$（$R$=Ce、Pr、Nd）的局域磁性质，发现其磁态随温度升高的转变及无序度变化规律，低温磁性受稀土离子有序化影响。
中文摘要 AI 辅助
本文研究了室温下被报道具有斯格明子泡晶格的稀土金属间化合物材料$R$Mn$_2$Ge$_2$（$R$=Ce、Pr、Nd）。三种材料的磁性特征为：当温度$T$升高时，磁态从锥形磁结构转变为共线反铁磁结构，伴随局域涨落的出现；在该已报道存在斯格明子泡织构的温度区间，观测到与其他斯格明子宿主材料类似的动力学行为；在该转变温度以上，无序程度随系列中$R$从Ce到Nd递增；低温下，磁性受稀土离子有序化影响，系列不同成员表现出不同的行为。
英文摘要
We present an investigation of the rare-earth intermetallic materials, $R$Mn$_2$Ge$_2$ ($R$=Ce, Pr, Nd), reported to host a lattice of skyrmionic bubbles at room temperature. The magnetism of all three materials is characterised by the onset of local fluctuations as the magnetic state changes from a conical magnetic structure to a collinear antiferromagnetic one as temperature $T$ is increased. In this $T$ regime, where skyrmion-bubble textures have been reported, we see dynamics similar to those observed in other skyrmion-hosting materials. The level of disorder above this transition increases across the series from $R$=Ce to Nd. At low temperatures the magnetism is affected by the ordering of the rare-earth ions, resulting in distinct behaviour for the different members of the series.
