Superconductivity at 11.3 K induced by cobalt doping in CeOFeAs

Abstract

Pure phases of a new oxyarsenide superconductor of the nominal composition CeOFe0.9Co0.1As was successfully synthesized by solid state reaction in sealed silica ampoules at 1180 C. It crystallizes in the layered tetragonal ZrCuSiAs type structure (sp gp P4/nmm) with lattice parameter of a = 3.9918(5) angstrom and c = 8.603(1) angstrom. A sharp superconducting transition is observed at 11.31 K with an upper critical field of 45.22 T at ambient pressure. The superconducting transition temperature is drastically lowered (~ 4.5, 4.9 K) on increasing the concentration (x = 0.15, 0.2) of cobalt.

References in corpus (11)

• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO
• Superconductivity at 25 K in hole doped $(L{a}_{1-x}S{r}_x)OFeAs$
• Superconductivity at 52 K in iron-based F-doped layered quaternary compound Pr[O1-xFx]FeAs
• Superconductivity in Co-doped LaFeAsO
• Superconductivity at 53.5 K in GdFeAsO1-delta
• Superconductivity in Co-doped SmFeAsO

Cited by in corpus (11)

• Charge doping versus disorder in CeFeAsO: do the in- and out-of-plane dilutions play the same role?
• Upper critical field, superconducting energy gaps, and Seebeck coefficient in La0.8Th0.2OFeAs
• Enhancement in superconducting transition temperature and upper critical field of LaO0.8F0.2FeAs with antimony doping
• Electronic phase diagram of NdFe1-xRhxAsO
• Superconductivity in SmFe1-xCoxAsO (x = 0.0 to 0.30)
• Appearance and disappearance of superconductivity in SmFe1-xNixAsO (x = 0.0 to 1.0)
• Magnetic phase diagram in the Co-rich side of LnCo1-xFexAsO (Ln=La, Sm) system
• Electron doping of the iron-arsenide superconductor CeFeAsO controlled by hydrostatic pressure
• Iron substitution in NdCoAsO: crystal structure and magnetic phase diagram
• Study of Ni and Zn doped CeOFeAs: Effect on the structural transition and specific heat capacity
• Evolution of superconductivity in PrFe1-xCoxAsO with x = 0.0 to 1.0