Coexistence of static magnetism and superconductivity in SmFeAsO<SUB>1‑x</SUB>F<SUB>x</SUB> as revealed by muon spin rotation

;
• Niedermayer, Ch.
;
• Baker, P. J.
;
• Pratt, F. L.
;
• Blundell, S. J.
;
• Lancaster, T.
;
• Liu, R. H.
;
• Wu, G.
;
• Chen, X. H.
;
• Watanabe, I.
;
• Malik, V. K.
;
• Dubroka, A.
;
• Rössle, M.
;
• Kim, K. W.
;
• Baines, C.
;
• Bernhard, C.

Abstract

In non-conventional superconductors, the competition of magnetic order and superconductivity seems to be a key element for the origin of superconductivity. Investigation of the newly discovered iron-pnictides superconductors challenges this picture, showing a coexistence of superconductivity and magnetism.