Evidence from magnetoresistance measurements for an induced triplet superconducting state in La0.7Ca0.3MnO3/YBa2Cu3O7-δ multilayers

Angular magnetoresistance measurements were performed on La0.7Ca0.3MnO3/YBa2Cu3O7-delta/La0.7Ca0.3MnO3 (LCMO/YBCO/LCMO) trilayers below and above the superconducting transition temperature T-c of the YBCO layer. The conductance of the LCMO layer increases by two orders of magnitude below T-c, while its dissipation is due to vortex motion with highly spin-polarized vortex cores. These results are evidence for induced triplet superconductivity into the ferromagnet over a distance of about 4.7 nm.