Elastic Constants of ZnTe and ZnSe between 77°–300°K

The elastic constants of single crystals of ZnTe and ZnSe (zinc-blende type) have been determined over the temperature range 77°–300°K by means of the ultrasonic pulse-echo method. The velocity of the longitudinal and two transverse waves propagated in the [110] direction showed 1%–1.4% increase at 77°K from the room-temperature values and as a result, the elastic constants of both crystals showed 2%–3.5% increase at 77°K from the room-temperature values. From the low-temperature elastic constants, the Debye temperature was calculated to be 225.3°K for ZnTe and 278.5°K for ZnSe, respectively.