Spin-spin interaction interpretation of results in Zn-Mn

We suggest that a crystal field interpretation of susceptibility paramagnetic resonance and specific heat results in Zn?Mn is not consistent and that ion-ion interactions more readily account for observed behavior. Using a spin-spin interaction model we find the exchange to be both anisotropic and dependent on more than ion first-nearest-neighbor interactions alone. Cluster contributions are found in both the specific heat and susceptibility.