Zero to π transition in superconductor-ferromagnet-superconductor junctions
J. W. A. Robinson, S. Piano, G. Burnell, C. Bell, M. G. Blamire
DOI 10.1103/PhysRevB.76.094522 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report a systematic study of Nb/ferromagnet (FM)/Nb trilayer structures in which the FM layer is one of the strong ferromagnets Co, Fe, Ni, and Ni80Fe20(Py). Accurate control of the FM layer thickness has enabled detailed studies of the magnetic and transport properties in the superconducting state. In all cases, we estimate the thickness of the magnetic dead layer and the exchange energies of the ferromagnetic layers; in doing so, we demonstrate inconsistencies between the exchange energies derived elsewhere from superconductor (S)/FM bilayer experiments and from S/FM/S junction measurements compared to their bulk Curie temperatures, which may hint at further complexity in the underlying physics. We show results in support of a recent publication [J. W. A Robinson et al., Phys. Rev. Lett. 97, 177003 (2006)], focus in detail on a single 0−π phase transition, and show evidence for the appearance of a second harmonic in the current-phase relation at the minimum of the critical current.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9 | Pressure not reported | unknown |
Similar papers
Magnetization Dynamics in Proximity-Coupled Superconductor-Ferromagnet-Superconductor Multilayers
similarity 0.96I.A. Golovchanskiy et al.
Source status unknown — claims are unverified
Thickness Dependence of the Josephson Ground States of Superconductor-Ferromagnet-Superconductor Junctions
similarity 0.96V. A. Oboznov et al.
Source status unknown — claims are unverified
Thermodynamic nature of the 0–π quantum transition in superconductor/ferromagnet/superconductor trilayers
similarity 0.96N. Pompeo et al.
Source status unknown — claims are unverified
Transport in superconductor/ferromagnet/superconductor junctions dominated by interface resistance
similarity 0.95O. Bourgeois et al.
Source status unknown — claims are unverified
Depairing currents in the superconductor/ferromagnet proximity system Nb/Fe
similarity 0.95J. M. E. Geers et al.
Source status unknown — claims are unverified
Domain-wall enhancement of superconductivity in superconductor/ferromagnet hybrids: Case of weak ferromagnets
similarity 0.95M. Flokstra & J. Aarts
Source status unknown — claims are unverified