Coexistence of long-ranged magnetic order and superconductivity in the pnictide superconductor SmFeAsO 1 − x F x <mml:…
2009; American Physical Society; Volume: 80; Issue: 22 Linguagem: Inglês
10.1103/physrevb.80.220503
ISSN1550-235X
AutoresD. H. Ryan, J. M. Cadogan, C. Ritter, F. Canepa, A. Palenzona, M. Putti,
Tópico(s)Iron-based superconductors research
ResumoPowder neutron-diffraction measurements on both SmFeAsO and the fluorine-doped superconductor, ${\text{SmFeAsO}}_{0.85}{\text{F}}_{0.15}$, show that the Sm sublattice orders magnetically. In both cases we observe a simple layered antiferromagnetic arrangement of the $\ensuremath{\sim}0.5{\ensuremath{\mu}}_{B}$ Sm moments. This provides direct evidence that long-ranged magnetic order of the samarium moments coexists with superconductivity in the ${\text{SmFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ system.
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