Effect of High Magnetic Fields on the Electronic Specific Heat in the Strongly Pauli-Paramagnetic Compound LuCo2

Abstract

The low-temperature (1.3 to 20.0 K) heat capacity of the strongly Pauli-paramagnetic Lu${\mathrm{Co}}_2$ compound was measured in magnetic fields up to ∼10 T. The measured results show that the electronic-specific-heat constant decreases with increasing magnetic field (11% at 10 T), while the Debye temperature does not change. This is probably due to the depression of spin fluctuation enhancement of the heat capacity by moments induced on the cobalt atoms by the high magnetic fields. These results appear to be in accord with recent theoretical predictions.