MESOSCOPIC TUNNELING IN DISORDERED MAGNETIC SYSTEMS : A COMPARISON WITH MACROSCOPIC TUNNELING IN SQUIDS B. Barbara, P. C. E. Stamp et M. UeharaJ. Phys. Colloques, 49 C8 (1988) C8-529-C2-530DOI: https://doi.org/10.1051/jphyscol:19888240