Pressure-induced quantum critical behavior and magnetic order in YbNi3Ga9 with a chiral crystal structure: ac calorimetric measurements up to 12 GPa
Pressure-induced quantum critical behavior and magnetic order in YbNi3Ga9 with a chiral crystal structure: ac calorimetric measurements up to 12 GPa
复制标题
具有手性晶体结构的 YbNi3Ga9 中压力诱导的量子临界行为和磁序：高达 12 GPa 的交流量热测量
DOI：
10.1103/physrevb.98.024420
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发表时间：
2018
影响因子：
3.7
通讯作者：
Toshiro Takabatake
中科院分区：
文献类型：
--
作者：
Kazunori Umeo;Takumi Otaki;Yudai Arai;Shigeo Ohara;Toshiro Takabatake
具有三角结构的手性化合物在环境压力下是一种价态波动材料，在高于9gpa的压力下发生磁序。我们用交流量热法研究了该化合物在12gpa压力下的温度-压力-磁场相图。比热除以温度，当施加压力到。在8.6 GPa下，在2-9 K的温度范围内表现出依赖性。饱和到一个大值，即重费米-液体行为。在上面，在1.6 K处出现一个宽的最大值，表明磁序的开始。随着温度的进一步增加，峰值向更高的温度移动，并在5k时转变为尖峰型峰值。通过使用温度，压力和磁场的比热数据，我们在每个值处都构建了相图。另一个场诱导有序相仅以格式出现在图中。讨论了这种诱导相的起源与报道的手性孤子晶格和斯基子晶格的关系。
The chiral compoundwith a trigonal structure, which is a valence fluctuating material at ambient pressure, undergoes a magnetic order under pressure aboveof 9 GPa. We have studied the temperature-pressure-magnetic-field phase diagrams of this compound by ac calorimetric measurements under pressuresup to 12 GPa. The specific heatdivided by temperature, markedly increases with applying pressure up to. At 8.6 GPa, just belowexhibitsdependence in the temperature range 2–9 K. Atis saturated to a large value, i.e., heavy Fermi-liquid behavior. At, just above, a broad maximum inappears at 1.6 K, indicating the onset of the magnetic order. With increasingfurther, the maximum shifts to a higher temperature and transforms to a sharp-type peak at 5 K for. By using the temperature, pressure, and magnetic fielddependences of the specific-heat dataobtained underand, we have constructedphase diagrams at eachvalue. Another field-induced ordered phase appears in the diagrams only forat. The origin of this induced phase is discussed in relation to the chiral soliton lattice and the skyrmion lattice reported for chiral magnets.