Formation of magnetic dots in an ultrathin Co film forced by a patterned buffer A. Wawro, A. Petroutchik, L. T. Baczewski, Z. Kurant and A. Maziewski EPL, 89 3 (2010) 37003 Published online: 17 February 2010 DOI: 10.1209/0295-5075/89/37003