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Experimental investigation of the role of the triplet pairing in the superconducting spin-valve effect

  • Superconductivity
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Abstract

An important role of the morphology of a superconducting layer in the superconducting spin-valve effect has been established. The triplet pairing induced by the superconductor/ferromagnet proximity effect has been experimentally investigated for samples CoO x /Py1/Cu/Py2/Cu/Pb (where Py = Ni0.81Fe0.19) with a smooth superconducting layer. The optimization of the parameters of this structure has demonstrated a complete switching between the normal and superconducting states with a change in the relative orientation of magnetizations of the ferromagnetic layers from the antiparallel to orthogonal orientation. A pure triplet contribution has been observed for the sample with a permalloy layer thickness at which the superconducting spin-valve effect vanishes. A direct comparison of the experimental data with the theoretical calculation of the temperature of the transition to the superconducting state has been performed for the first time.

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Authors and Affiliations

  1. Kazan Zavoisky Physical-Technical Institute (KPhTI) of the Kazan Scientific Center of the Russian Academy of Sciences, Sibirskii tract 10/7, Kazan, Tatarstan, 420029, Russia

    P. V. Leksin, A. A. Kamashev, N. N. Garif’yanov, A. A. Validov & I. A. Garifullin

  2. Landau Institute for Theoretical Physics of Russian Academy of Sciences, pr. Akademika Semenova 1-A, Chernogolovka, Moscow region, 142432, Russia

    Ya. V. Fominov

  3. Moscow Institute of Physics and Technology (State University), Institutskii per. 9, Dolgoprudnyi, Moscow region, 141700, Russia

    Ya. V. Fominov

  4. Leibniz Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstraße 20, Dresden, 01069, Germany

    P. V. Leksin, J. Schumann, V. E. Kataev & B. Büchner

  5. Institut für Festkörperphysik, Technische Universität Dresden, Dresden, D-01062, Germany

    B. Büchner

Authors
  1. P. V. Leksin
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  2. A. A. Kamashev
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  3. N. N. Garif’yanov
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  4. A. A. Validov
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  5. Ya. V. Fominov
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  6. J. Schumann
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  7. V. E. Kataev
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  8. B. Büchner
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  9. I. A. Garifullin
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Corresponding author

Correspondence to I. A. Garifullin.

Additional information

Original Russian Text © P.V. Leksin, A.A. Kamashev, N.N. Garif’yanov, A.A. Validov, Ya.V. Fominov, J. Schumann, V.E. Kataev, B. Büchner, I.A. Garifullin, 2016, published in Fizika Tverdogo Tela, 2016, Vol. 58, No. 11, pp. 2094–2103.

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Leksin, P.V., Kamashev, A.A., Garif’yanov, N.N. et al. Experimental investigation of the role of the triplet pairing in the superconducting spin-valve effect. Phys. Solid State 58, 2165–2176 (2016). https://doi.org/10.1134/S1063783416110214

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