Magnetization and heat-capacity measurements onZn1−xCrxTe

We have taken magnetization and calorimetric measurements on ${\mathrm{Zn}}_{1\mathrm{-}\mathit{x}}$ ${\mathrm{Cr}}_{\mathit{x}}$Te (x=0.003). The heat-capacity measurements show a Schottky peak indicating an energy-level splitting of 3.1 K between the ground and first excited states. Above 1.5 K we observe additional heat capacity, which indicates the presence of additional low-energy vibronic excitations. The magnetization data reveal a small anisotropy (∼7%) with the (111) direction giving the largest value. The magnetization data were fit with a model including a static Jahn-Teller distortion proposed previously in these materials [J. T. Vallin, G. A. Slack, S. Roberts, and A. E. Hughes, Phys. Rev. B 2, 4313 (1970)]. Reasonable agreement was found with the data for a spin-orbit parameter of -59 ${\mathrm{cm}}^{\mathrm{-}1}$ and a Jahn-Teller energy of 320 ${\mathrm{cm}}^{\mathrm{-}1}$.