Search Results (2 total)

We report the first high-precision specific-heat measurements on the heavy-fermion compound UPt₃, over a wide temperature (1.4 K<T<40 K) and field range (B<24.5 T), thus covering the metamagnetic transition at 20 T. The data, taken on a single-crystalline sample, show a pronounced low-temperature maximum in the enhanced γ^* value at 20 T for a field direction in the hexagonal plane. We also investigate the presence of a T³ln(T/T^*) contribution to the specific heat in field.

We report calorimetric measurements of the organic conductor (TMTSF)₂ClO₄ in the quantum limit. In addition to the field-induced spin-density-wave (FISDW) phases, we have measured the magnetic-field-dependent specific heat associated with the recently discovered reentrant phase. In terms of a semiempirical model, we find that the reentrant transition is second order, but that the electronic density of states is greatly reduced in the reentrant phase. We also observe a specific-heat signal corresponding to the anomalous ‘‘fast oscillations’’ which are known to coexist with the FISDW phases