We present Muon spectroscopy investigations on SmFeAsO1−xFx showing coexistence of magnetic order and superconductivity only in a very narrow F-doping range. The sharp crossover between the two types of order is similar to that observed in LaFeAsO1−xFx, suggesting a common behavior for the 1111 pnictides. The analysis of the muon asymmetry demonstrates that the coexistence must be nanoscopic, i.e., the two phases must be finely interspersed over a typical length scale of few nm. In this regime both the magnetic and the superconducting transition temperatures collapse to very low values. Our data suggest a competition between the two order parameters.

Magnetic-superconducting phase boundary of SmFeAsO1−xFx studied via muon spin rotation: Unified behavior in a pnictide family / S., Sanna; DE RENZI, Roberto; G., Lamura; C., Ferdeghini; A., Palenzona; M., Putti; M., Tropeano; T., Shiroka. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 80:(2009), pp. 052503-1-052503-4. [10.1103/PhysRevB.80.052503]

Magnetic-superconducting phase boundary of SmFeAsO1−xFx studied via muon spin rotation: Unified behavior in a pnictide family

DE RENZI, Roberto;
2009-01-01

Abstract

We present Muon spectroscopy investigations on SmFeAsO1−xFx showing coexistence of magnetic order and superconductivity only in a very narrow F-doping range. The sharp crossover between the two types of order is similar to that observed in LaFeAsO1−xFx, suggesting a common behavior for the 1111 pnictides. The analysis of the muon asymmetry demonstrates that the coexistence must be nanoscopic, i.e., the two phases must be finely interspersed over a typical length scale of few nm. In this regime both the magnetic and the superconducting transition temperatures collapse to very low values. Our data suggest a competition between the two order parameters.
2009
Magnetic-superconducting phase boundary of SmFeAsO1−xFx studied via muon spin rotation: Unified behavior in a pnictide family / S., Sanna; DE RENZI, Roberto; G., Lamura; C., Ferdeghini; A., Palenzona; M., Putti; M., Tropeano; T., Shiroka. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 80:(2009), pp. 052503-1-052503-4. [10.1103/PhysRevB.80.052503]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2279243
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