Dielectric properties and relaxation phenomena in the diffuse ferroelectric phase transition in K3Li2Nb5O15 ceramicA. Belboukhari, Z. Abkhar, Y. Gagou, J. Belhadi, R. Elmoznine, D. Mezzane, M. El Marssi and I. Luk’yanchukEur. Phys. J. B, 85 6 (2012) 215DOI: https://doi.org/10.1140/epjb/e2012-21000-1