Area-dependence of spin-triplet supercurrent in ferromagnetic Josephson junctions
arXiv:1204.6418 · doi:10.1103/PhysRevB.85.214522
Abstract
Josephson junctions containing multiple ferromagnetic layers can carry spin-triplet supercurrent under certain conditions. Large-area junctions containing multiple domains are expected to have a random distribution of 0 or pi coupling across the junction surface, whereas magnetized samples should have uniquely pi coupling everywhere. We have measured the area dependence of the critical current in such junctions, and confirm that the critical current scales linearly with area in magnetized junctions. For as-grown (multi-domain) samples, the results are mixed. Samples grown on a thick Nb base exhibit critical currents that scale sub-linearly with area, while samples grown on a smoother Nb/Al multilayer base exhibit critical currents that scale linearly with area. The latter results are consistent with a theoretical picture due to Zyuzin and Spivak that predicts that the as-grown samples should have global pi/2 coupling.
7 pages, 8 figures, submitted to Phys. Rev. B
References in corpus (1)
Cited by in corpus (22)
- Spin-polarized supercurrents for spintronics: a review of current progress
- Controllable 0-pi Josephson junctions containing a ferromagnetic spin valve
- Spin-orbit coupling as a source of long-range triplet proximity effect in superconductor-ferromagnet hybrid structures
- Spin-valve Josephson junctions for cryogenic memory
- Amplitude control of spin-triplet supercurrent in S/F/S Josephson junctions
- Supercurrent in ferromagnetic Josephson junctions with heavy metal interlayers
- φ-State and Inverted Fraunhofer Pattern in Nonaligned Josephson Junctions
- Spin Triplet Supercurrent in Co/Ni Multilayer Josephson Junctions with Perpendicular Anisotropy
- Ferromagnetic Materials for Josephson π Junctions
- Phase Controllable Josephson Junctions for Cryogenic Memory
- Robustness of Spin-Triplet Pairing and Singlet-Triplet Pairing Crossover in Superconductor/Ferromagnet Hybrids
- Critical Current Oscillations of Elliptical Josephson Junctions with Single-Domain Ferromagnetic Layers
- Critical Current Oscillations of Josephson Junctions Containing PdFe Nanomagnets
- Spin-valve Josephson junctions with perpendicular magnetic anisotropy for cryogenic memory
- Long-Range triplet Josephson Current Modulated by the Interface Magnetization Texture
- Spin-triplet supercurrent in Josephson junctions containing a synthetic antiferromagnet with perpendicular magnetic anisotropy
- Spin-polarized triplet supercurrent in Josephson junctions with perpendicular ferromagnetic layers
- Distortions to the penetration depth and coherence length of superconductor/normal-metal superlattices
- Ferromagnetic Josephson junctions for cryogenic memory
- Pt and CoB trilayer Josephson junctions with perpendicular magnetic anisotropy
- Absence of magnetic interactions in Ni-Nb ferromagnet-superconductor bilayers
- Large critical current density Josephson junctions with PdNi barriers