Magnetic AC susceptibility of stoichiometric and low zinc doped magnetite single crystals M. Bałanda, A. Wiecheć, D. Kim, Z. Kąkol, A. Kozłowski, P. Niedziela, J. Sabol, Z. Tarnawski and J. M. Honig Eur. Phys. J. B, 43 2 (2005) 201-212 Published online: 25 February 2005 DOI: 10.1140/epjb/e2005-00043-5