Physics – Condensed Matter – Superconductivity
Scientific paper
2009-11-28
Europhysics Letters EPL 91, 47005, (2010)
Physics
Condensed Matter
Superconductivity
7 pages, 5 figures
Scientific paper
10.1209/0295-5075/91/47005
The magnetic field dependence of the in-plane magnetic penetration depth for optimally doped SmFeAsO_(1-x)F_y was investigated by combining torque magnetometry, SQUID magnetometry, and muon-spin rotation. The results obtained from these techniques show all a pronounced decrease of the superfluid density as the field is increased up to 1.4 T. This behavior is analysed within a two-band model with self-consistently derived coupled gaps, where the superfluid density related to the larger gap is field independent and the superfluid density related to the smaller gap is strongly suppressed with increasing field.
Bendele Markus
Bukowski Zbigniew
Bussmann-Holder Annette
Karpinski Janusz
Katrych Sergiy
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