The annealing effect on structure, magnetoresistance and magnetic properties of Co/Bi/Co thin films S. I. Vorobiov, O. V. Shutylieva, I. M. Pazukha and A. M. Chornous Eur. Phys. J. Plus, 131 6 (2016) 203 Published online: 21 June 2016 DOI: 10.1140/epjp/i2016-16203-7