Critical-temperature-oscillations dependence on Mn concentration in superconducting Nb/CuMn multilayers
C. Attanasio, C. Coccorese, L. V. Mercaldo, S. L. Prischepa, M. Salvato, L. Maritato
DOI 10.1103/PhysRevB.57.14411 · Physical Review B
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Abstract
We have measured, at different Mn concentrations, the superconducting critical temperature Tc of Nb/CuMn multilayers in the cases both where CuMn layer thickness was varied with fixed Nb layer thickness and, vice versa, keeping constant CuMn and varying Nb layer thicknesses. The Tc values exhibit an oscillating behavior strongly dependent upon the Mn concentration. Several models have been discussed to interpret our measurements. The analysis of the experimental data seems to suggest the presence of a π phase difference of the superconducting order parameter across neighboring Nb layers driven by the magnetic nature of the CuMn alloy.
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. | 6.5 | Pressure not reported | zero_resistance |
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