Hysteretic magnetic pinning and reversible resistance switching in   High-Tc superconductor/ferromagnet multilayers
  We study a high-TC superconducting (YBa2Cu3O7-d) / ferromagnetic (Co/Pt multilayer) hybrid which exhibits resistance switching driven by the magnetic history: depending on the direction of the external field, a pronounced decrease or increase of the mixed-state resistance is observed as magnetization reversal occurs within the Co/Pt multilayer. We demonstrate that stray magnetic fields cause these effects via i) creation of vortices/antivortices and ii) magnetostatic pinning of vortices that are induced by the external field. 
C. Visani, P. J. Metaxas, A. Collaudin, B. Calvet, R. Bernard, J.   Briatico, C. Deranlot, K. Bouzehouane and J. E. Villegas
cond-mat.supr-con cond-mat.mes-hall cond-mat.mtrl-sci