Intrinsic Ferromagnetic Impurity Phases in SmFeAsO1−x F x Detected by μSR |
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| Authors: | S. Sanna R. De Renzi G. Lamura C. Ferdeghini A. Martinelli A. Palenzona M. Putti M. Tropeano T. Shiroka |
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| Affiliation: | (1) CNISM and Physics Department, University of Parma, Parma, Italy;(2) CNR-INFM-LAMIA and University of Genova, Genova, Italy;(3) Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institut, Villigen PSI, Switzerland |
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| Abstract: | We report μSR measurements on SmFeAsO1−x F x which helped us to identify the signature of diluted ferromagnetic inclusions, ubiquitous in the iron pnictides. These impurities are characterized by a Curie temperature close to room temperature and they seem responsible for a non negligible magnetic relaxation of the implanted muons, which should not be confused with intrinsic pnictide properties. |
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| Keywords: | Pnictides Superconductivity Magnetic impurities Muon spin spectroscopy |
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