The role of uncompensated spins in exchange biasing I. Schmid, P. Kappenberger, O. Hellwig, M. J. Carey, E. E. Fullerton and H. J. Hug EPL, 81 1 (2008) 17001 Published online: 19 November 2007 DOI: 10.1209/0295-5075/81/17001