Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 51: Superconductivity: Tunneling, Josephson Junctions, SQUIDs
TT 51.7: Vortrag
Mittwoch, 9. März 2016, 16:30–16:45, H19
"Isolation" of the proximity-induced triplet pairing channel in the superconductor/ferromagnet spin valve — •Pavel Leksin1,2, Nadir Garifyanov2, Andrey Kamashev2, Aidar Validov2, Yakov Fominov3,4, Joachim Schumann1, Vladislav Kataev1, Jürgen Thomas1, Bernd Büchner1,5, and Ilgiz Garifullin2 — 1Leibniz Institute for Solid State and Materials Research IFW Dresden, D-01171 Dresden, Germany — 2Zavoisky Physical-Technical Institute, Russian Academy of Sciences, 420029 Kazan, Russia — 3L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 142432 Chernogolovka, Russia — 4Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia — 5Institute for Solid State Physics, Technical University Dresden, D-01062 Dresden, Germany
We have studied the proximity induced superconducting triplet pairing in CoOx/Py1/Cu/Py2/Cu/Pb spin-valve structure. By optimizing the parameters of structures we found a full switching between the normal and superconducting states. To observe an "isolated" triplet spin-valve effect we exploited the oscillatory feature of the magnitude of the ordinary spin-valve effect Δ Tc in the dependence of the Py2-layer thickness dPy2. We determined the value of dPy2 at which Δ Tc caused by the ordinary spin-valve effect (the difference in Tc between antiparallel and parallel mutual orientation of magnetizations of the Py1 and Py2 layers) is suppressed. For such a sample a "pure" triplet spin-valve effect which causes the minimum in Tc at the orthogonal configuration of magnetizations has been observed.