Muon-spin rotation studies of SmFeAsO_0.85 and NdFeAsO_0.85 superconductors

Details Muon-spin rotation studies of SmFeAsO_0.85 and NdFeAsO_0.85 superconductors Muon-spin rotation studies of SmFeAsO_0.85 and NdFeAsO_0.85 superconductors

2008-05-13

arxiv.org/abs/0805.1923v1

Phys. Rev. B 78, 092506 (2008)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures

Scientific paper

10.1103/PhysRevB.78.092506

Measurements of the in-plane magnetic field penetration depth \lambda_{ab} in Fe-based superconductors with the nominal composition SmFeAsO_0.85 (T_c\simeq52K) and NdFeAsO_0.85 (T_c\simeq51K) were carried out by means of muon-spin-rotation. The absolute values of \lambda_{ab} at T=0 were found to be 189(5)nm and 195(5)nm for Sm and Nd substituted samples, respectively. The analysis of the magnetic penetration depth data within the Uemura classification scheme, which considers the correlation between the superconducting transition temperature T_c and the effective Fermi temperature T_F, reveal that both families of Fe-based superconductors (with and without fluorine) falls to the same class of unconventional superconductors.

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