Perpendicular giant magnetoresistance of CoFeB/Cu single and dual spin-valve films

The giant magnetoresistance measurements in the current-perpendicular-to-plane mode on single and dual spin valves with areas ranging from 0.1 to 1.0 mu m(super 2) are discussed. The magnetoresistance change increases by 20 percent by the insertion of a nonmagnetic spacer layer in the free layer.