Abstract:
Elastic properties of multiferroic PbFe$_{2/3}$W$_{1/3}$O$_3$ (PFW) ceramics have been studied in a temperature range of 4.2–400 K, which contains the regions of existence of the ferroelectric relaxor and antiferromagnetic phases. The longitudinal, shear, and bulk elasticity moduli, Young’s modulus, and Poisson's ratio of PFW ceramics have been determined for the first time. Regions of temperature stability of the elastic properties extending over several dozen degrees have been found.