We have determined the spin-memory-loss parameter, δCo/Ru, by measuring the transmission of spin-triplet and spin-singlet Cooper pairs across Co/Ru interfaces in Josephson junctions and by Current-Perpendicular-to-Plane Giant Magnetoresistance (CPP-GMR) techniques. The probability of spin-memory loss at the Co/Ru interface is (1−exp(−δCo/Ru)). From the CPP-MR, we obtain δCo/Ru=0.34−0.02+0.04 that is in good agreement with δCo/Ru=0.35±0.08 obtained from spin-triplet transmission. For spin-singlet transmission, we have δCo/Ru=0.64±0.05 that is different from that obtained from CPP-GMR and spin-triplet transmission. The source of this difference is not understood.
Cite
@article{arxiv.1104.3095,
title = {Spin-memory loss at Co/Ru interfaces},
author = {Mazin A. Khasawneh and Carolin Klose and W. P. Pratt, and Norman O. Birge},
journal= {arXiv preprint arXiv:1104.3095},
year = {2012}
}