Drew, Alan J. Pratt, F. L. Lancaster, T. Blundell, S. J. Baker, P. J. Liu, R. H. Wu, G. Chen, X. H. Watanabe, I. Malik, Vivek Kumar Dubroka, Adam Kim, Kyung Wan Rössle, Matthias Bernhard, Christian 2008-08-29 Muon spin rotation experiments were performed on the pnictide high temperature superconductor SmFeAsO_1-<i>x</i>F_<i>x</i> with <i>x</i>=0.18 and 0.3. We observed an unusual enhancement of slow spin fluctuations in the vicinity of the superconducting transition which suggests that the spin fluctuations contribute to the formation of an unconventional superconducting state. An estimate of the in-plane penetration depth Λ_{<i>a</i><i>b</i>}(0)=190(5) nm was obtained, which confirms that the pnictide superconductors obey an Uemura-style relationship between <i>T</i>_<i>c</i> and Λ_{<i>a</i><i>b</i>}(0)⁻². application/pdf https://folia.unifr.ch/global/documents/300939 https://folia.unifr.ch/documents/300939/files/drew_cmf.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevLett.101.097010 info:eu-repo/semantics/openAccess License undefined Physical Review Letters. - 2008, vol. 101, no. 9, p. 097010 Magnetic properties of superconductors muon spin rotation and relaxation in condensed matter info:eu-repo/classification/udc/53 Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO1-xFx measured by muon spin rotation http://purl.org/coar/resource_type/c_6501