AI 中文总结
通过高分辨率磁化测量，研究CePdAl中几何阻挫与近藤效应的竞争，观测到80 mK下的一级变磁转变、4.3 T处的非线性磁化率异常，未发现高场区域非费米液体行为，为理解其磁场诱导自旋液体态提供热力学约束。
AI 中文摘要
CePdAl是具有准kagome结构的重费米子化合物，其中几何阻挫与近藤效应相互竞争。我们使用高灵敏度磁强计，在80 mK下观测到CePdAl中存在无磁化平台的清晰一级变磁转变，这表明在磁场下通过抑制近藤效应和有序磁矩的自旋翻转可解除阻挫。4.3 T处的非线性磁化率异常，暗示极化顺磁态中存在非偶极关联。此外，在反铁磁序被完全抑制的高场区域，未发现非费米液体行为的证据。这些发现为理解CePdAl中磁场诱导的自旋液体态确立了关键的热力学约束。
英文摘要
CePdAl is a heavy-fermion compound with a quasi-kagome structure, where geometrical frustration competes with the Kondo effect. Using a high-sensitivity magnetometer, we observe clear first-order metamagnetic transitions without magnetization plateaus in CePdAl at 80 mK, indicating a lifting of frustration through the suppression of the Kondo effect and spin flips of ordered moments under fields. An anomaly in the nonlinear magnetic susceptibility at 4.3 T suggests nondipolar correlations in the polarized paramagnetic state. Furthermore, we found no evidence of non-Fermi-liquid behavior in the high-field region, where the antiferromagnetic order is completely suppressed. These findings establish the essential thermodynamic constraints for understanding the field-induced spin-liquid state in CePdAl.
Comments6 pages, accepted for Physical Review Letters
