Evidence for Triplet Superconductivity in a Superconductor-Ferromagnet Spin Valve

Abstract

We have studied the dependence of the superconducting (SC) transition temperature on the mutual orientation of magnetizations of Fe1 and Fe2 layers in the spin valve system CoO_x/Fe1/Cu/Fe2/Pb. We find that this dependence is nonmonotonic when passing from the parallel to the antiparallel case and reveals a distinct minimum near the orthogonal configuration. The analysis of the data in the framework of the SC triplet spin valve theory gives direct evidence for the long-range triplet superconductivity arising due to noncollinearity of the two magnetizations.

5 pages (including 4 EPS figures). Version 2: final version as published in PRL

References in corpus (4)

• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Superconducting triplet spin valve
• Triplet proximity effect in FSF trilayers
• Phase Diagrams of Ferromagnet-Superconductor Multilayers with Misaligned Exchange Fields

Cited by in corpus (16)

• Signature of magnetic-dependent gapless odd frequency states at superconductor/ferromagnet interfaces
• Controlled suppression of superconductivity by the generation of polarized Cooper pairs in spin valve structures
• Angular dependence of superconductivity in superconductor / spin valve heterostructures
• Magnetization-control and transfer of spin-polarized Cooper pairs into a half-metal manganite
• Proximity Induced Vortices and Long-Range Triplet Supercurrents in Ferromagnetic Josephson Junctions and Spin Valves
• Creation of spin-triplet Cooper pairs in the absence of magnetic ordering
• General framework for transport in spin-orbit-coupled superconducting heterostructures: Nonuniform spin-orbit coupling and spin-orbit-active interfaces
• Tunneling Conductance and Spin Transport in Clean Ferromagnet-Ferromagnet-Superconductor Heterostructures
• Unanticipated proximity behavior in ferromagnet-superconductor heterostructures with controlled magnetic noncollinearity
• Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy
• Adiabatic and nonadiabatic spin torques induced by spin-triplet supercurrent
• Transport in Ferromagnet/Superconductor spin valves
• Long-range proximity effect in Nb-based heterostructures induced by a magnetically inhomogeneous permalloy layer
• Colossal proximity effect in a superconducting triplet spin valve based on halfmetallic ferromagnetic CrO2
• Cooper pair splitting in ballistic ferromagnetic SQUIDs
• Theoretical study of magnetism induced by proximity effect in a ferromagnetic Josephson junction with a normal metal