Elastic Properties of AuCuZn₂ in the Martensitic Phase Transition

Abstract

The shear elastic constant (Remark: Graphics omitted.) of AuCuZn₂, whose mode is relevant to its martensitic transformation, has been directly measured as a function of temperature near the transformation temperature T_M. It is found that the shear elastic constant takes on a positive temperature derivative, 6.2×10⁻⁴/deg, near T_M. This value is not so large as the previously reported one, so the shear elastic constant does not seem to vanish near T_M. The present values are in good accord with neutron diffraction data previously reported.