Optimized factor of merit of the magneto-optical Kerr effect of ferromagnetic thin films N. Richard, A. Dereux, J. P. Goudonnet, F. Scheurer, E. Beaurepaire and P. Beauvillain Eur. Phys. J. B, 14 3 (2000) 419-422 Published online: 15 April 2000 DOI: 10.1007/s100510051049