Static magnetic order and superfluid density of RFeAs(O,F) (R=La,Nd,Ce) and LaFePO studied by muon spin relaxation: unusual similarities with the behavior of cuprate superconductors. Academic Article uri icon

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abstract

  • Muon spin relaxation measurements in iron-oxypnictide systems have revealed: (1) commensurate long-range order in undoped LaFeAsO; (2) a Bessel function line shape in LaFeAs(O0.97F0.03) which indicates possible incommensurate or stripe magnetism; (3) anomalous weak magnetism existing in superconducting LaFePO, CeFeAs(O0.084F0.16), and NdFeAs(O0.88F0.12) but absent in superconducting LaFeAs(O0.92F0.08); and (4) scaling of the superfluid density with T_{c} in the Ce-, La-, and Nd-FeAs superconductors following a nearly linear relationship found in cuprates.

authors

  • Carlo, JP
  • Uemura, YJ
  • Goko, T
  • Macdougall, GJ
  • Rodriguez, JA
  • Yu, W
  • Luke, Graeme
  • Dai, Pengcheng
  • Shannon, N
  • Miyasaka, S
  • Suzuki, S
  • Tajima, S
  • Chen, GF
  • Hu, WZ
  • Luo, JL
  • Wang, NL

publication date

  • February 27, 2009