Electrical conductivity identification of a carbon fiber composite material plate using a rotating magnetic field and multi-coil eddy current sensorAhmed Chaouki Lahrech, Bachir Abdelhadi, Mouloud Feliachi, Abdelhalim Zaoui and Mohammed NaїdjateEur. Phys. J. Appl. Phys., 83 2 (2018) 20901DOI: https://doi.org/10.1051/epjap/2018170411