caa a22 4500 445379839 CHVBK 20180317143014.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s10948-011-1156-y doi (NATIONALLICENCE)springer-10.1007/s10948-011-1156-y Effect on Diamagnetism and Phonon Modes due to Mg and Be Doping at Ca Sites in Cu0.5Tl0.5Ba2Ca3− y M y Cu4O12− δ ( y =0 and 1.5 for M=Mg, Be) High Temperature Superconductors [Elektronische Daten] [Babar Shabbir, Muhammad Malik, Nawazish Khan] We synthesized as prepared and oxygen annealed Cu0.5Tl0.5Ba2Ca3−y M y Cu4O12−δ (y=0 and 1.5 for M=Mg, Be) High Temperature Superconductors (HTSCs) by using the solid state reaction method. It is observed that superconducting properties and the magnitude of the diamagnetism are enhanced by the doping of Mg and Be at the Ca site; this is due to smaller ionic sizes and higher electronegativities of Mg and Be as compared to Ca. Furthermore, interplanar coupling is also improved and shrinking of the axis length is the direct evidence of it. The carrier's concentration in conducting planes is improved by carrying out post-annealing experiments in the oxygen atmosphere. Moreover, FTIR absorption measurements are also incorporated. Springer Science+Business Media, LLC, 2011 Diamagnetism nationallicence CuTl-1234 High Temperature superconductors nationallicence Enhanced superconductivity nationallicence Shabbir Babar Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut Malik Muhammad BS Department, SEECS, NUST, Sector H-12, Islamabad, Pakistan aut Khan Nawazish Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/6(2011-08-01), 1977-1983 1557-1939 24:6<1977 2011 24 10948 https://doi.org/10.1007/s10948-011-1156-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-011-1156-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shabbir Babar Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Malik Muhammad BS Department, SEECS, NUST, Sector H-12, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Khan Nawazish Materials Science Laboratory, Department of Physics, Quaid-i-Azam University, 45320, Islamabad, Pakistan aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/6(2011-08-01), 1977-1983 1557-1939 24:6<1977 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer