Abstract
We have synthesized Ru1Sr2Gd2-xCexCu2O10 (Ru-1222) materials using several concentrations of Ce. All ruthenocuprate compounds have been characterised by using standard X-ray diffraction (XRD) and Scanning Electron Micrographs (SEM). The concentration of Ce affects transport properties drastically. Compounds with x=0.5 remain nonsuperconducting with moderate resistivity even after annealing in different conditions. Enormous change in the normal state resistivity has been observed in different annealing conditions of Ru-1222 with x=0.5. Superconducting properties have been observed in compounds with x=0.65. The highest critical temperature obtained is 27.5K for x=0.65. In addition, the duration of annealing in flowing oxygen is found to be effective in changing the normal state resistivity for x=0.65.
Publisher
Trans Tech Publications, Ltd.
Reference14 articles.
1. I. Felner , U. Asaf , Y. Lavi , and O. Milio , Phys. Rev. B 55 (1997) 3374.
2. P.W. Klamut , Superconductor Science and technology 21 (2008) 093001.
3. G.V.M. Williams and M. Ryan , Phys. Rev. B 64 (2001) 094515.
4. V.P.S. Awana, M. Karppinen, H. Yamauchi, in Studies of High Tc Superconductors, edited by A. V. Narlikar, Nova Science Publishers, New York, 2003, 46 (2003) 77.
5. I. Felner, I. Nowik, M.I. Tsindlickt , O. Yuli, I. Asulin, O. Millo, V.P.S. Awana, H.S. Kishan Balamurugan, E. Takayama-Muromachi, Phys. Rev. B 76 (2007) 144514.