The Kerr effect observations in the non oriented steel laminations R. Kaczmarek, F. Protat, X. Duan, H. Huneus, J. Schneider et K. LeuridanJ. Phys. IV France, 08 PR2 (1998) Pr2-311-Pr2-314DOI: https://doi.org/10.1051/jp4:1998272