Nanoscopic coexistence of magnetic and superconducting states within the FeAs layers of CeFeAsO1−xFx
S. Sanna, R. De Renzi, T. Shiroka, G. Lamura, G. Prando, P. Carretta, M. Putti, A. Martinelli, M. R. Cimberle, M. Tropeano, A. Palenzona
DOI 10.1103/PhysRevB.82.060508 · Physical Review B
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Abstract
We report on the coexistence of magnetic and superconducting states in CeFeAsO1−xFx for x=0.06(2), characterized by transition temperatures Tm=30 K and Tc=18 K, respectively. Zero-field and transverse-field muon-spin-relaxation measurements show that below 10 K the two phases coexist within a nanoscopic scale over a large volume fraction. This result clarifies the nature of the magnetic-to-superconducting transition in the CeFeAsO1−xFx phase diagram, by ruling out the presence of a quantum critical point which was suggested by earlier studies.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| CeFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | onset |
| CeFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | onset |
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