TY - JOUR
T1 - Effect on diamagnetism and phonon modes due to Mg and Be doping at Ca sites in Cu0.5Tl0.5Ba2Ca3-yMyCu4O12-δ (y=0 and 1.5 for M=Mg, Be) high temperature superconductors
AU - Shabbir, Babar
AU - Malik, Muhammad Imran
AU - Khan, Nawazish A.
PY - 2011/8/1
Y1 - 2011/8/1
N2 - We synthesized as prepared and oxygen annealed Cu 0.5Tl 0.5Ba 2Ca 3-y M y Cu 4O 12-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.
AB - We synthesized as prepared and oxygen annealed Cu 0.5Tl 0.5Ba 2Ca 3-y M y Cu 4O 12-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.
KW - CuTl-1234 High Temperature superconductors
KW - Diamagnetism
KW - Enhanced superconductivity
UR - http://www.scopus.com/inward/record.url?scp=79960556584&partnerID=8YFLogxK
U2 - 10.1007/s10948-011-1156-y
DO - 10.1007/s10948-011-1156-y
M3 - Article
AN - SCOPUS:79960556584
SN - 1557-1939
VL - 24
SP - 1977
EP - 1983
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 6
ER -