Ce2Sb与Ce2Bi中磁场诱导的反铁磁三临界点数据集

对 Ce2Sb 和 Ce2Bi 单晶的物理性质进行了详细研究，其中分别在 8.2 和 10 K 左右发生反铁磁跃迁。 施加磁场时平行于 c 轴时，在低温下观察到变磁相变，对应于磁场致相变。 发现场致跃迁从二阶在较高温度，在低温下为一阶，表明两者都存在三临界点（TCPs）。 由于用 Sb 代替 Bi 会抑制 TCP 降低温度并对应于正化学压力，这些结果表明对 Ce2Sb 施加压力可能会抑制 TCP 降低温度，可能在量子三临界点处为零温度。A detailed study of the physical properties of Ce₂Sb and Ce₂Bi single crystals was conducted, where antiferromagnetic transitions occur at approximately 8.2 K and 10 K, respectively. When the applied magnetic field is parallel to the c-axis, a metamagnetic phase transition is observed at low temperatures, which corresponds to the field-induced phase transition. The field-induced transition is found to be second-order at higher temperatures and first-order at low temperatures, indicating the presence of tricritical points (TCPs) in both compounds. Since substituting Bi with Sb suppresses TCPs and lowers the transition temperature, corresponding to positive chemical pressure, these results suggest that applying pressure to Ce₂Sb may also suppress TCPs and lower the transition temperature, potentially reaching a zero-temperature quantum tricritical point.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于Ce2Sb和Ce2Bi单晶的物理性质研究，揭示了在磁场作用下发生的反铁磁跃迁和变磁相变。研究发现，场致跃迁从二阶变为一阶，表明存在三临界点，且化学压力影响其温度行为。这为理解量子调控和重费米子体系中的临界现象提供了实验数据。