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

Abstract

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 $\Delta T_c$ in the dependence of the Py2-layer thickness $d_{Py2}$. We determined the value of $d_{Py2}$ at which $\Delta T_c$ caused by the ordinary spin-valve effect (the difference in the superconducting transition temperature $T_c$ 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 $T_c$ at the orthogonal configuration of magnetizations has been observed.

References in corpus (6)

• Superconducting Spintronics
• Evidence for Triplet Superconductivity in a Superconductor-Ferromagnet Spin Valve
• Superconducting triplet spin valve
• Observation of the Triplet Spin-Valve Effect in a Superconductor-Ferromagnet Heterostructure
• Controlled suppression of superconductivity by the generation of polarized Cooper pairs in spin valve structures
• Angular dependence of superconductivity in superconductor / spin valve heterostructures

Cited by in corpus (7)

• Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
• Superconducting switching due to triplet component in the Pb/Cu/Ni/Cu/Co${}_2$Cr${}_{1-x}$Fe${}_x$Al${}_y$ spin-valve structure
• Superconducting spin valves controlled by spiral re-orientation in B20-family magnets
• Control of superconductivity with a single ferromagnetic layer in niobium/erbium bilayers
• Superconducting spin valve effect in the Co/Pb/Co heterostructure with insulating interlayers
• Expanding the operational temperature window of a superconducting spin valve
• Probing the degree of spin polarization of a ferromagnet with ferromagnet/superconductor proximity effect