Electrical and Structural Properties of Ca Substitution in High and Low Density Y(Ba1-xCax)2Cu3O7-δ Superconductor

Azhan Hashim; Abd Wahab Norazidah; Azman Kasim; A. Nazree; S. Akmal Syamsyir; H.N. Hidayah; J.S. Hawa

doi:10.4028/www.scientific.net/MSF.846.586

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HomeMaterials Science ForumMaterials Science Forum Vol. 846Electrical and Structural Properties of Ca...

Electrical and Structural Properties of Ca Substitution in High and Low Density Y(Ba_1-xCa_x)₂Cu₃O_7-δ Superconductor

Abstract:

The effect of Ca substitution on the electrical and structural properties in high and low density Y(Ba_1-xCa_x)₂Cu₃O_δ where x = 0.00, 0.10, 0.20 and 0.30 via solid state reaction method has been investigated. The electrical properties, elemental analysis, and structural identification were measured by the four-point probe technique, energy dispersive x-ray (EDX) and X-ray diffraction (XRD) respectively. The electrical properties such as critical temperature (T_c) and critical current density (J_c) were found to be strongly dependent in both high and low densities Y(Ba_1-xCa_x)₂Cu₃O_7-δ. These parameters were decreased monotonously with the increasing of Ca substitution. An obvious results of the Ca-doped samples can be seen in x = 0.20 where T_{c zero} of high density sample is 77 K, which is higher than that of the low density sample that occurred at 73 K. Meanwhile, J_c at 60 K for high density is 1.842 A/cm² compared to 1.410 A/cm² in low density sample. EDX analysis confirmed the existence of Ca in all doped samples. The crystallographic structure remained orthorhombic and the volume of unit cell increased towards further increased of Ca concentration.

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Materials Science Forum (Volume 846)

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586-590

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.846.586

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March 2016

Authors:

Azhan Hashim*, Abd Wahab Norazidah, Azman Kasim, A. Nazree, S. Akmal Syamsyir, H.N. Hidayah, J.S. Hawa

Keywords:

Ca Substitution, Superconductor, YBCO

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