Effects of size and surface anisotropy on thermal magnetization and hysteresis in the magnetic clusters Z. Huang, Z. Chen, S. Li, Q. Feng, F. Zhang and Y. Du Eur. Phys. J. B, 51 1 (2006) 65-73 Published online: 31 May 2006 DOI: 10.1140/epjb/e2006-00188-7