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

P. V. Leksin; N. N. Garif'yanov; A. A. Kamashev; A. A. Validov; Ya. V. Fominov; J. Schumann; V. Kataev; J. Thomas; B. Büchner; I. A. Garifullin

doi:10.1103/PhysRevB.93.100502

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

P. V. Leksin, N. N. Garif'yanov, A. A. Kamashev, A. A. Validov, Ya. V. Fominov, J. Schumann, V. Kataev, J. Thomas, B. Büchner, I. A. Garifullin

DOI 10.1103/PhysRevB.93.100502 · Physical Review B

T1

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Abstract

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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7.2	Pressure not reported	unknown