Details

Autor(en) / Beteiligte

• PRAKASH, J
• SINGH, S. J
• PATNAIK, S
• GANGULI, A. K

Titel

Superconductivity in CeO1-xFxFeAs with upper critical field of 94 T

Ist Teil von

• Physica. C, Superconductivity, 2009-02, Vol.469 (2-3), p.82-85

Ort / Verlag

Amsterdam: Elsevier

Erscheinungsjahr

2009

Quelle

ScienceDirect

Beschreibungen/Notizen

• We have successfully synthesized Ce based oxypnictide superconductors with fluorine doping (CeO1-xFxFeAs) by a two step solid state reaction method. Detailed XRD and EDX confirm the crystal structure and chemical compositions. We observe that an extremely high Hc2(0) of 94 T can be achieved in the x = 0.1 composition. This increase in Hc2(0) is accompanied by a decrease in transition temperature (38.4 K in x = 0.1 composition) from 42.5 K for the x = 0.2 phase. The in-plane Ginzburg-Landau coherence length is estimated to be 27 A at x = 0.2 suggesting a moderate anisotropy in this class of superconductors. The Seebeck coefficient confirms the majority carrier to be electrons and strong dominance of electron-electron correlations in this multiband superconductor.