Spin-Wave Contribution to Specific Heat and Magnetization in Canted Spin Arrays

The dispersion law for spin waves in a cubic canted spin array has been derived. From this dispersion law the spin-wave contributions to the specific heat and magnetization have been obtained. The integrals involved in the expressions for these quantities have been evaluated numerically for a moderate range of the system description parameters B and F. In a special case the behavior of the spin wave contribution has been shown to change from T3/2 at very low temperature to T³ at somewhat higher temperatures. This phenomenon is discussed in terms of some available data on low-temperature spin system specific heats.