PUMA
Istituto dei materiali per l'elettronica ed il magnetismo     
Cimberle M. R., Sanna S., De Renzi R., Shiroka T., Lamura G., Prando G., Carretta P., Putti M., Martinelli A., Tropeano M., Palenzona A. Nanoscopic coexistence of magnetic and superconducting states within the FeAs layers of CeFeAsO1−xFx. In: Physical Review B, vol. 82 (6) article n. 060508. APS, 2010.
 
 
Abstract
(English)
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.
URL: http://link.aps.org/doi/10.1103/PhysRevB.82.060508
DOI: 10.1103/PhysRevB.82.060508
Subject Superconduttori a base ferro
coesistenza superconduttivitą e magnetismo
misure di Muon spin relaxation
74.70.Xa
74.25.Ha
76.75.+i


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