Specific heat ofCsNiF3

We have remeasured the specific heat of ${\mathrm{CsNiF}}_3$ in the temperature and field ranges 4<T<18 K and 0≤H≤10 kG on a large single crystal of good quality. The specific-heat values are somewhat larger than those in our earlier measurements, and we attribute this to surface degradation in the older sample. The structure in both the field and temperature dependence remains essentially unchanged; in particular, the $T^2$ dependence of the field at which the specific-heat peaks is confirmed. Estimates of the demagnetizing corrections indicate a rather large contribution from magnetic-dipole interactions to the magnitude of the specific heat, especially at the lowest temperatures.