Critical fields of the superconducting fullerene RbCs2C60
V. Buntar, M. Riccò, L. Cristofolini, H. W. Weber, F. Bolzoni
DOI 10.1103/PhysRevB.52.4432 · Physical Review B
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Abstract
The temperature dependence of the upper critical magnetic field Hc2 of the superconducting RbCs2C60 fullerene has been obtained. The value of Hc2(0) at zero temperature is estimated to be 17 T and the coherence length ξ(0)=4.4 nm. The lower critical field Hc1 has been studied using three different methods. The Hc1(T) dependence obtained from the procedures based on the deviation from perfect diamagnetism and on Bean’s critical-state model has a positive curvature with decreasing temperature. It is shown from a high-field analysis that this saturationless dependence does not reflect the intrinsic Hc1 of the superconductor. The value of Hc1(0) is estimated to be 5.5–8.1 mT and the penetration depth λ(0)=300–370 nm.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| RbCs2C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 33 | Pressure not reported | onset |
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