We report the results of high-resolution dc magnetization and specific-heat measurements at very low temperatures for a single crystal of ${\mathrm{UBe}}_{13}$ in magnetic fields applied along the [001] and [111] directions, in both the normal and superconducting states. In the normal state, magnetic susceptibility $\chi \left(T\right)=M/H$ exhibits a logarithmic temperature dependence over a wide temperature range (1–20 K). However, with increasing field, this non-Fermi-liquid (NFL) behavior of $\chi \left(T\right)$ at low temperatures is suppressed. Moreover, a susceptibility maximum occurs below 4 T, whereas Fermi-liquid coherence is recovered above 8 T. In addition, thermodynamic anomalies ($T_{\mathrm{A}}$ and $H_{\mathrm{A}}$) occur in both magnetic susceptibility and specific heat at intermediate fields (6–10 T) along the [111] direction. Furthermore, a nontrivial fifth-order nonlinear susceptibility is observed in the normal-state magnetization of ${\mathrm{UBe}}_{13}$. These results suggest a close relationship between the field-induced multipolar correlations of $5f$-electron degrees of freedom and the Fermi-surface reconstruction accompanying the crossover from the NFL state to the Fermi-liquid state in ${\mathrm{UBe}}_{13}$.

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• Density of states
• Fermi surface
• Kondo effect
• Magnetic anisotropy
• Magnetic susceptibility
• Specific heat
• Spin-triplet pairing
• Superconductivity
• Heavy-fermion systems
• Single crystal materials
• Strongly correlated systems
• Magnetization measurements
• Specific heat measurements
• Susceptibility measurements