Publication: Superconductivity in ruthenium-based layered cuprate RuSr2(Gd2-xCex)Cu2Oz
Date
2002
Authors
Yeoh W.K.
Kek C.A.
Abd-Shukor R.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
We report the preparation procedure of RuSr2 (Gd2-x Cex)Cu2Oz (Ru-1222) cuprate superconductors from x = 0.5 to 0.7 using the solid state reaction method. All compositions showed an almost single Ru-1222 phase with tetragonal symmetry in the 14/mmm space group and semiconducting or semi-metallic normal state behaviour. The RuSr2(Gd1.4Ce0.6)Cu2Oz material exhibits the highest transition temperature with Tc onset near 48 K and Tc zero at 30 K. The transition temperature is very much dependent on the preparation procedure and can be further improved by optimizing the doping levels.
Description
Keywords
Doping (additives) , Ruthenium compounds , Solid state physics , Superconducting transition temperature , Superconductivity , Solid state reactions , Oxide superconductors