Clean-limit pair breaking and two-dimensional vortex dynamics in ferromagnet-superconductor heterostructures
K. Senapati, R. C. Budhani
DOI 10.1103/PhysRevB.70.174506 · Physical Review B
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Abstract
Superconductivity in YBa2Cu3O7 films of thickness dY<500Å sandwiched between ferromagnetic and nonmagnetic epitaxial layers has been probed. The irreversibility temperature Tirr(H) in the vortex state maps onto a clean-limit pair-breaking temperature Tc(H), and a universal relation exists between the pair-breaking field Hpb and an effective thickness deff(<dY) of the superconductor. The vortex response in these two-dimensional (2D) films indicates a crossover temperature T*, which separates two regimes of flux motion controlled by formation of dislocations (T>T*), and migration of preexisting dislocations and dislocation pairs (T<T*) in the 2D flux line lattice.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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