Spin polarization effect on spin Coulomb drag in a two-dimensional electron system Amir Hosein Esmailian, Faramarz Kanjouri and Fatemeh Tavasoli Eur. Phys. J. B, 86 4 (2013) 151 Published online: 10 April 2013 DOI: 10.1140/epjb/e2013-30720-5