Sensors and energy harvesters based on (1–x)PMN-xPT piezoelectric ceramics Houda Lifi, Chouaib Ennawaoui, Abdelowahed Hajjaji, Samira Touhtouh, Said Laasri, Madiha Yessari and Mohammed Benjelloun Eur. Phys. J. Appl. Phys., 88 1 (2019) 10901 Published online: 17 December 2019 DOI: 10.1051/epjap/2019190085