Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K

Details Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K

2009-11-05

arxiv.org/abs/0911.0970v1

Phys. Rev. B 80, 94523 (2009)

Physics

Condensed Matter

Superconductivity

23 Pages, 1 Table, 5 Figures

Scientific paper

A series of new Sr2-xBaxCuO3+y (0 x 0.6) superconductors were prepared using high-pressure and high-temperature synthesis. A Rietveld refinement based on powder x-ray diffraction confirms that the superconductors crystallize in the K2NiF4-type structure of a space group I4/mmm similar to that of La2CuO4 but with partially occupied apical oxygen sites. It is found that the superconducting transition temperature Tc of this Ba substituted Sr2CuO3+y superconductor with constant carrier doping level, i.e., constant d, is controlled not only by order/disorder of apical-O atoms but also by Ba content. Tcmax =98 K is achieved in the material with x=0.6 that reaches the record value of Tc among the single-layer copper oxide superconductors, and is higher than Tc=95K of Sr2CuO3+y with optimally ordered apical-O atoms. There is Sr-site disorder in Sr2-xBaxCuO3+y which might lead to a reduction of Tc. The result indicates that another effect surpasses the disorder effect that is related either to the increased in-plane Cu-O bond length or to elongated apical-O distance due to Ba substitution with larger cation size. The present experiment demonstrates that the optimization of local geometry out of the Cu-O plane can dramatically enhance Tc in the cuprate superconductors.

Affiliated with

Also associated with

No associations

Rating

Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Out of plane effect on the superconductivity of Sr2-xBaxCuO3+y with Tc up to 98K will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-417726