Numerical investigation of spin-torque using the Heisenberg model C. Schieback, M. Kläui, U. Nowak, U. Rüdiger and P. Nielaba Eur. Phys. J. B, 59 4 (2007) 429-433 Published online: 02 March 2007 DOI: 10.1140/epjb/e2007-00062-2