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Regular version of the site

Article

Isolation of proximity-induced triplet pairing channel in a superconductor/ferromagnet spin valve

Physical Review B: Condensed Matter and Materials Physics. 2016. Vol. 93. P. 100502-1-100502-5.
Leksin P., Garif'yanov N., Kamashev A., Validov A., Ya.V. Fominov, Schumann J., Kataev V., Thomas J., Büchner B., Garifullin I.

We have studied the proximity-induced superconducting triplet pairing in CoO_x/Py1/Cu/Py2/Cu/Pb spin-valve structure (where Py = Ni_{0.81}Fe_{0.19}). By optimizing the parameters of this structure we found a triplet channel assisted 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 ΔTc in the dependence of the Py2-layer thickness dPy2. We determined the value of dPy2 at which ΔTc caused by the ordinary spin-valve effect (the difference in the superconducting transition temperature Tc between the 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.