Isolation of proximity-induced triplet pairing channel in a superconductor/ferromagnet spin valve
Leksin, P. V. · Garifyanov, N. N. · Kamashev, A. A. · Validov, A. A. · Fominov, Ya. V. · Schumann, J. · Kataev, V. · Thomas, J. · Büchner, B. · Garifullin, I. A.
Original · EN
We have studied the proximity-induced superconducting triplet pairing in CoOₓ/Py1/Cu/Py2/Cu/Pb spin-valve structure (where Py = Ni₀.₈₁Fe₀.₁₉). 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.
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