Trapping cold neutral atoms with an iron-core electromagnet B. Desruelle, V. Boyer, P. Bouyer, G. Birkl, M. Lécrivain, F. Alves, C. I. Westbrook and A. Aspect Eur. Phys. J. D, 1 3 (1998) 255-258 Published online: 15 March 1998 DOI: 10.1007/s100530050090