Redetermination of the heat capacity of single phaseβ-cerium

Abstract
The heat capacity of a carefully characterized β-Ce sample was measured from 1 to 20 K. The present results are in excellent agreement with the earlier data from 1.5 to 12.8 and 15.8 to 20 K. Between 12.8 and 15.8 the present results are ∼4% higher than the earlier values and this is thought to be due to less lattice strains in the present sample. The magnetic heat capacity below 1.33 K exhibits an exponential behavior, yielding an energy gap of 1.41 ± 0.02 K.