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Title of Journal: J Supercond Nov Magn

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Abbravation: Journal of Superconductivity and Novel Magnetism

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Springer US

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DOI

10.1002/chin.199208221

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ISSN

1557-1947

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Superconducting and Magnetic Properties of Zndope

Authors: N P Liyanawaduge Shiva Kumar Singh Anuj Kumar V P S Awana H Kishan
Publish Date: 2010/12/01
Volume: 24, Issue: 5, Pages: 1599-1605
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Abstract

The superconducting properties and AC/DC magnetic properties of YBa2Cu3−x Zn x O7−δ x=00 001 003 005 010 and 015 compounds were investigated Samples were synthesized through solidstate reaction route Xray diffraction data confirms the singlephase orthorhombic/tetragonal crystallization for the studied samples ThermoGravimetric Analysis TGA was done for pure and Zndoped YBa2Cu3O7−δ YBCO samples Results reveal that at higher dopant levels the doped samples are more oxygendeficient than the undoped ones The superconducting properties of YBa2Cu3−x Zn x O7−δ system always enhance with addition of oxygen to Cu–O chains which causes enhancement of superconducting carrier density together with orthorhombic structure Zn substitution causes an overall reduction of superconducting condensation energy with systematic degradation of superconducting properties like T c and J c This occurs via induced nonhomogeneity of hole carrier density created by extended nature of perturbation on electronic structure in CuO2 planes and its weaklink type behavior AC susceptibility measurement reveals that Zn doping reduces the intergranular couplings Scanning Electron Microscope SEM images indicate that increment of average grain size with increasing of Zn concentration

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