Structure and magnetism on iron oxide clusters FenOm(n = 1-5): Calculation from first principles H. Shiroishi, T. Oda, I. Hamada and N. Fujima Eur. Phys. J. D, 24 1-3 (2003) 85-88 Published online: 03 July 2003 DOI: 10.1140/epjd/e2003-00136-3