Magnetic Properties of the Au-Al-Yb Approximant under Hydrostatic Pressure
Magnetic Properties of the Au-Al-Yb Approximant under Hydrostatic Pressure
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Au-Al-Yb 近似材料在静水压力下的磁性能
DOI：
10.1088/1742-6596/809/1/012013
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and N. K. Sato
中科院分区：
文献类型：
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作者：
S. Matsukawa;K. Deguchi;K. Imura;T. Ishimasa;and N. K. Sato
我们报告交流磁化率测量的Au-Al-Yb近似压力下。在临界压力Pc <$2GPa下，近似态表现出非常规的量子临界性，当P> Pc时，在低温（Tg <$100mK）下出现磁有序态.我们发现非线性极化率在线性极化率峰值温度Tg附近有一个峰值。我们还发现，Tg随调制场频率的增加而增加。从这些结果中，我们认为，近似低于Tg的磁有序状态是一个自旋玻璃状的短程有序状态。
We report on ac magnetic susceptibility measurements of the Au-Al-Yb approximant under pressure. It is known that the approximant shows unconventional quantum criticality at the critical pressure P c∼ 2 GPa, and further that the magnetic ordered state emerges at a low temperature (T g∼ 100 mK) for P> P c. We nd that the nonlinear susceptibility shows a peak around the temperature T g at which the linear susceptibility peaks. We also nd that T g increases with frequency of the modulation eld. From these results, we suggest that the magnetic ordered state of the approximant below T g is a spin-glass-like short-range ordered state.