Angular dependence of superconductivity in superconductor / spin valve heterostructures

Abstract

We report measurements of the superconducting transition temperature, $T_c$, in CoO/Co/Cu/Co/Nb multilayers as a function of the angle $\alpha$ between the magnetic moments of the Co layers. Our measurements reveal that $T_c(\alpha )$ is a nonmonotonic function, with a minimum near $\alpha =\pi /2$. Numerical self-consistent solutions of the Bogoliubov - de Gennes equations quantitatively and accurately describe the behavior of $T_c$ as a function of $\alpha$ and layer thicknesses in these superconductor / spin-valve heterostructures. We show that experimental data and theoretical evidence agree in relating $T_c(\alpha )$ to enhanced penetration of the triplet component of the condensate into the Co/Cu/Co spin valve in the maximally noncollinear magnetic configuration.

9 pages, 9 figures

References in corpus (19)

• Proximity effects in superconductor-ferromagnet heterostructures
• Coupling of two superconductors through a ferromagnet : evidence for a pi-junction
• A spin triplet supercurrent through the half-metallic ferromagnet CrO2
• Observation of spin-triplet superconductivity in Co-based Josephson Junctions
• Evidence for Triplet Superconductivity in a Superconductor-Ferromagnet Spin Valve
• Superconducting triplet spin valve
• Odd Triplet Pairing in clean Superconductor/Ferromagnet heterostructures
• Observation of the Triplet Spin-Valve Effect in a Superconductor-Ferromagnet Heterostructure
• Long range spin supercurrents in ferromagnetic CrO${}_2$ using a multilayer contact structure
• Angular Dependence of the Superconducting Transition Temperature in Ferromagnet-Superconductor-Ferromagnet Trilayers
• Induced Triplet Pairing in clean s-wave Superconductor/Ferromagnet layered structures
• Observation of standard spin-switch effects in F/S/F trilayers with a strong ferromagnet
• Proximity effects and characteristic lengths in ferromagnet-superconductor structures
• Proximity effects and triplet correlations in Ferromagnet/Ferromagnet/Superconductor nanostructures
• Observation of Andreev bound states at spin-active interfaces
• Supra-oscillatory critical temperature dependence of Nb-Ho bilayers
• Thermodynamics and Phase Diagrams of layered superconductor/ferromagnet nanostructures
• Effect of Interface Induced Exchange Fields on Cuprate-Manganite Spin Switches
• Unanticipated proximity behavior in ferromagnet-superconductor heterostructures with controlled magnetic noncollinearity

Cited by in corpus (40)

• Superconducting Spintronics
• Theory of the spin-galvanic effect and the anomalous phase-shift ${\phi }_0$ in superconductors and Josephson junctions with intrinsic spin-orbit coupling
• Signature of magnetic-dependent gapless odd frequency states at superconductor/ferromagnet interfaces
• Supercurrent Diode Effect, Spin Torques, and Robust Zero-Energy Peak in Planar Half-Metallic Trilayers
• Half-Metallic Superconducting Triplet Spin Valve
• Spin Supercurrent, Magnetization Dynamics, and Phi-State in Spin-Textured Josephson Junctions
• Zero Energy Peak and Triplet Correlations in Nanoscale SFF Spin-Valves
• Triplet proximity effect in superconducting heterostructures with a half-metallic layer
• Creation of equal-spin triplet superconductivity at the Al/EuS interface
• Amplitude control of spin-triplet supercurrent in S/F/S Josephson junctions
• Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers
• Charge and Spin Currents in Ferromagnetic Josephson junctions
• Josephson Currents and Spin Transfer Torques in Ballistic SFSFS Nanojunctions
• Proximity Induced Vortices and Long-Range Triplet Supercurrents in Ferromagnetic Josephson Junctions and Spin Valves
• Isolation of proximity-induced triplet pairing channel in a superconductor/ferromagnet spin valve
• Superconducting spin-valve effect in heterostructures with ferromagnetic Heusler alloy layers
• Superconducting spin valves controlled by spiral re-orientation in B20-family magnets
• Magnetic control of superconducting heterostructures using compensated antiferromagnets
• Tunneling Conductance and Spin Transport in Clean Ferromagnet-Ferromagnet-Superconductor Heterostructures
• Magnetic exchange fields and domain wall superconductivity at an all-oxide superconductor / ferromagnet insulator interface
• Spin Transport in Half-Metallic Ferromagnet-Superconductor Junctions
• Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy
• Transport in Ferromagnet/Superconductor spin valves
• Control of superconductivity with a single ferromagnetic layer in niobium/erbium bilayers
• Spin current and spin transfer torque in ferromagnet/superconductor spin valves
• Spin-split conductance and subgap peak in ferromagnet/superconductor spin valve heterostructures
• Superconducting spin valves based on antiferromagnet/superconductor/antiferromagnet heterostructures
• Spin transport and Spin Tunnelling Magneto-Resistance (STMR) of F$|$NCSC$|$F spin valve
• Quasiparticle conductance in Spin Valve Josephson Structures
• Effect of Rashba spin-orbit coupling, magnetization and mixing of gap parameter on tunnelling conductance in F$|$NCSC junction of an F$|$S$|$F spin valve
• Stealth Majorana Zero Mode in a Trilayer Heterostructure MnTe/Bi2Te3/Fe(Te,Se)
• Colossal proximity effect in a superconducting triplet spin valve based on halfmetallic ferromagnetic CrO2
• Neel proximity effect in superconductor/antiferromagnet heterostructures
• Inverse proximity effect in thin-film superconductor/magnet heterostructures with metallic and insulating magnets
• Bias current dependence of superconducting transition temperature in superconducting spin valve nanowires
• Magnetism induced by nonlocal spin-entangled electrons in a superconducting spin-valve
• Triplet correlations in superconductor/antiferromagnet heterostructures: dependence on type of antiferromagnetic ordering
• Pseudo spin-valve switch based on ferromagnet/superconductor/ferromagnet trilayer microbridge
• Spin injection and spin relaxation in odd-frequency superconductors
• Gate-Tunable Superconducting Spin Valve in a van der Waals Ferromagnet/Superconductor/Ferromagnet Trilayer