ODD FREQUENCY TRIPLET PAIRING COMPONENTS IN F/S/F TRILAYERS

We calculate the singlet and triplet pairing components of F/S/F trilayers by solving the Usadel equation in the dirty limit. Here, S is a conventional singlet s-wave superconductor like Nb and F is a ferromagnet like CoFe. A particular focus is on the odd frequency triplet pairing components which have a long length scale in F region unlike the singlet pairing component. The triplet components in F/S/F are induced by the broken time reversal symmetry and the proximity effects. The cases of parallel and perpendicular orientations of the two F's are calculated and discussed for the fingerprint of the odd frequency triplet pairing components.