Volume 61, Number 2, January 2003
|Page(s)||254 - 260|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 January 2003|
SR study of carbon-doped superconductors
School of Chemistry, Physics and Environmental Science, University of Sussex Brighton BN1 9QJ, UK
2 Institute for Particle Physics, ETH Zurich - CH-5232 Villigen PSI, Switzerland
3 Institute for Materials Research, Tohoku University - Sendai 980-8577, Japan and CREST, Japan Science and Technology Corporation - Kawaguchi 332-0012, Japan
Accepted: 7 November 2002
The evolution of the superconducting properties of the carbon-doped superconductors, x (, 0.04, 0.06) have been investigated by the transverse-field muon spin rotation (TF-SR) technique. The low-temperature depolarisation rate, at 0.6 which is proportional to the second moment of the field distribution of the vortex lattice decreases monotonically with increasing electron doping and decreasing . In addition, the temperature dependence of has been analysed in terms of a two-gap model. The size of the two superconducting gaps decreases linearly as the carbon content increases.
PACS: 76.75.+i – Muon spin rotation and relaxation / 74.70.Ad – Metals, alloys and binary compounds (including A15, Laves phases, etc.) / 74.20.-z – Theories and models of superconducting state
© EDP Sciences, 2003
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