2008/12/24 by J. Prakash, Jai Prakash, S. J. Singh +4 · 1 citation
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Rare-earth and actinide compounds #cond-mat.supr-con
paper · pdf · doi:10.1016/j.physc.2008.11.008
published as Physica C 469 (2009) 82--85
arxiv created 2008/12/24 · openalex publication_date 2008/12/25 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have successfully synthesized Ce based oxypnictide 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.