Enhancement of GMR due to spin-mixing in magnetic multilayers with a   superconducting contact
  We study the Giant Magnetoresistance (GMR) ratio in magnetic multiayers with a single superconducting contact in the presence of spin-mixing processes. It has been recently shown that the GMR ratio of magnetic multilayers is strongly suppressed by the presence of a superconducting contact when spin-flipping is not allowed. In this Letter we demonstrate that the GMR ratio can be dramatically enhanced by spin-orbit interaction and/or non-collinear magnetic moments. The system is described using a tight-binding model with either s-p-d or s-d atomic orbitals per site. 
F. Taddei (1), S. Sanvito (2) and C. J. Lambert (1) ((1) Lancaster   University, UK, (2) University of California, USA)