Magnetic-field penetration depth and material parameters of V-Ag multilayered superconductors
K. Kanoda, H. Mazaki, N. Hosoito, T. Shinjo
DOI 10.1103/PhysRevB.35.8413 · Physical Review B
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Abstract
We have made measurements of the magnetic field penetration depth λ of V-Ag proximity-coupled multilayers for the first time. The layer-thickness dependence of λ exhibits a nonmonotonic behavior (existence of a minimum λ). This is interpreted as a crossover from a single superconductor to a composite one. When the Ag layer becomes thicker, the temperature dependence of λ begins to deviate from that of usual superconductors, showing that the proximity effect is involved. In addition, from λ and our previously found upper-critical-field parameters, the Ginzburg-Landau parameter, the thermodynamic critical field at 0 K, and the electronic coefficient of the normal-state specific heat are obtained. The variation of these parameters with layer thickness is also discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.31 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.86 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.64 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.33 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.44 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2.86 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.34 | Pressure unresolved | onset |
| V-Ag Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.38 | Pressure unresolved | onset |
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