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.

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• Exotic phases of matter
• Kondo effect
• Magnetic phase transitions
• Magnetic susceptibility
• Magnetism
• Phase diagrams
• Phase transitions
• Phase transitions by order
• Quantum phase transitions
• Thermal properties
• Heavy-fermion systems
• Strongly correlated systems
• Dilution refrigerator
• Magnetization measurements
• Susceptibility measurements