Journal article

Coexistence of magnetic fluctuations and superconductivity in the pnictide high temperature superconductor SmFeAsO1-xFx measured by muon spin rotation

  • Drew, Alan J. Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Pratt, F. L. ISIS Facility, Rutherford Appleton Laboratory, Chilton, Oxfordshire, United Kingdom
  • Lancaster, T. Department of Physics, Clarendon Laboratory, Oxford University, Oxford, United Kingdom
  • Blundell, S. J. Department of Physics, Clarendon Laboratory, Oxford University, Oxford, United Kingdom
  • Baker, P. J. Department of Physics, Clarendon Laboratory, Oxford University, Oxford, United Kingdom
  • Liu, R. H. Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui, China
  • Wu, G. Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui, China
  • Chen, X. H. Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui, China
  • Watanabe, I. RIKEN-RAL, Nishina Centre, 2-1 Hirosawa, Wako, Saitama, Japan
  • Malik, Vivek Kumar Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Dubroka, Adam Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Kim, Kyung Wan Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Rössle, Matthias Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Bernhard, Christian Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
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    29.08.2008
Published in:
  • Physical Review Letters. - 2008, vol. 101, no. 9, p. 097010
English Muon spin rotation experiments were performed on the pnictide high temperature superconductor SmFeAsO1-xFx with x=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 Λab(0)=190(5) nm was obtained, which confirms that the pnictide superconductors obey an Uemura-style relationship between Tc and Λab(0)⁻².
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
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Persistent URL
https://folia.unifr.ch/unifr/documents/300939
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