Magnetic field expulsion in superconducting granular ceramics and in polymer/superconductor composites A. Benlhachemi, M.A. Fremy, C. Breandon, H. Tatarenko, J.R. Gavarri and H. Benyaich J. Phys. IV France, 08 PR1 (1998) Pr1-35-Pr1-44 DOI: 10.1051/jp4:1998106