Vortex-glass behavior in superconducting K3C60 and Rb3C60
C. L. Lin, T. Mihalisin, N. Bykovetz, Q. Zhu, J. E. Fischer
DOI 10.1103/PhysRevB.49.4285 · Physical Review B
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Abstract
The temperature and field dependence of the magnetic susceptibility of well-characterized K3C60 and Rb3C60 show that the zero-field-cooled (ZFC) diamagnetism below Tc is irreversible for both systems, while the field-cooled (FC) curve is reversible, and that the ZFC diamagnetism is more than four times larger than the FC. This behavior is attributed to a vortex-glass state below Tc, similar to that observed in high-Tc cuprates as well as disordered conventional type-II superconductors. The field dependence of the vortex glass to vortex fluid transition temperature T* is found to follow the de Almeida–Thouless relation H=H0[1-T*(H)/T*(0)]γ, where γ=3/2 for both compounds.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| K3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | onset |
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 29 | Pressure not reported | onset |
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