caa a22 4500 445366699 CHVBK 20180317142932.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10909-011-0343-3 doi (NATIONALLICENCE)springer-10.1007/s10909-011-0343-3 Superconductivity in Co and Li Substituted Cu0.5Tl0.5Ba2Ca2Cu3− x Co x O10− δ [Elektronische Daten] [M. Mumtaz, Nawazish Khan, Anayat Ullah] We have tried to explore the possible sources of suppression of superconducting properties in cobalt substituted Cu0.5Tl0.5Ba2Ca2Cu3−x CoxO10−δ (x=0,0.05,0.1,0.5) superconductor. It can be expected from these studies that Co substitution at Cu sites in the CuO2 planes somehow localizes the carriers and decreases the mobile carriers density. The density of mobile carriers in the CuO2 planes can be restored by partial substitution of Li at Tl sites in Cu0.5Tl0.5Ba2O4−δ charge reservoir layer of Cu0.5Tl0.5Ba2Ca2Cu3−x CoxO10−δ superconductor; since alkali metals are known to lose their outermost "s-orbital” electron easily, which can be supplied to the CuO2 planes. The post-annealing experiments on these samples have been carried out in flowing oxygen and nitrogen and the motivation behind these extreme post-annealing conditions was to optimize the carriers density in the CuO2 planes of Cu0.5Tl0.5Ba2Ca2Cu3−x CoxO10−δ superconductor. The optimized free carrier density in the CuO2 planes enhances the superconducting properties of the final compound. Springer Science+Business Media, LLC, 2011 Cu0.5Tl0.5Ba2Ca2Cu3− x Co x O10− δ superconductor nationallicence Post-annealing nationallicence Carriers localization nationallicence Mumtaz M. Material Research Laboratory, Department of Physics, FBAS, International Islamic University (IIU), 44000, Islamabad, Pakistan aut Khan Nawazish Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut Ullah Anayat Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 163/3-4(2011-05-01), 203-213 0022-2291 163:3-4<203 2011 163 10909 https://doi.org/10.1007/s10909-011-0343-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-011-0343-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mumtaz M. Material Research Laboratory, Department of Physics, FBAS, International Islamic University (IIU), 44000, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Khan Nawazish Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Ullah Anayat Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 163/3-4(2011-05-01), 203-213 0022-2291 163:3-4<203 2011 163 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer