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arXiv · 1104.3095

Spin-memory loss at Co/Ru interfaces

Mazin A. Khasawneh·Carolin Klose·W. P. Pratt, Jr.·Norman O. Birge
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Abstract

We have determined the spin-memory-loss parameter, $δ_{Co/Ru}$, 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 $(1-exp(-δ_{Co/Ru}))$. From the CPP-MR, we obtain $δ_{Co/Ru} = 0.34^{+0.04}_{-0.02}$ that is in good agreement with $δ_{Co/Ru} = 0.35 \pm 0.08$ obtained from spin-triplet transmission. For spin-singlet transmission, we have $δ_{Co/Ru} = 0.64 \pm 0.05$ that is different from that obtained from CPP-GMR and spin-triplet transmission. The source of this difference is not understood.

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Mazin A. Khasawneh, Carolin Klose, W. P. Pratt, Jr., Norman O. Birge. 2011-04-15. Spin-memory loss at Co/Ru interfaces. https://doi.org/10.1103/physrevb.84.014425

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