Dielectric and structural properties of diffuse ferroelectric phase transition in Pb1.85K1.15Li0.15Nb5O15 ceramicE. Choukri, Y. Gagou, D. Mezzane, Z. Abkhar, R. El Moznine, I. Luk'yanchuk, P. Saint-Grégoire and A. V. KavokinEur. Phys. J. Appl. Phys., 53 2 (2011) 20901DOI: https://doi.org/10.1051/epjap/2010100073