Elastic Modulus and Mechanical Loss Associated with Phase Transitions and Domain Walls Motions in PZT Based Ceramics E.M. Bourim, H. Idrissi, B.L. Cheng, M. Gabbay et G. Fantozzi J. Phys. IV France, 06 C8 (1996) C8-633-C8-636 DOI: 10.1051/jp4:19968136