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 Tc in the Ce-, La-, and Nd-FeAs superconductors following a nearly linear relationship found in cuprates.
|Translated title of the contribution||Static Magnetic Order and Superfluid Density of RFeAsO; (R = La, Nd, Ce) and LaFePO Studied by Muon Spin Relaxation: Unusual Similarities with the Behaviour of Cuprate Superconductors|
|Pages (from-to)||087001-1 - 087001-4|
|Number of pages||4|
|Journal||Physical Review Letters|
|Publication status||Published - Feb 2009|