Electrical characterization and modelization of CaCu3Ti4O12 polycrystalline ceramicsChafe Cheballah, Zarel Valdez-Nava, Lionel Laudebat, Sophie Guillemet-Fritsch and Thierry LebeyEur. Phys. J. Appl. Phys., 70 3 (2015) 30902DOI: https://doi.org/10.1051/epjap/2015150063