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Structural and superconducting properties of Y(Ba1-xKx)2Cu3O7-δ ceramics


Dihom, Mustafa Mousa and Shaari, Abdul Halim and Baqiah, Hussein and Al-Hada, Naif Mohammed and Talib, Zainal Abidin and Chen, Soo Kien and Azis, Rabaah Syahidah and Kechik, Mohd Mustafa Awang and Lim, Kean Pah and Abd-Shukor, Roslan (2017) Structural and superconducting properties of Y(Ba1-xKx)2Cu3O7-δ ceramics. Ceramics International, 43 (14). 11339 - 11344. ISSN 0272-8842; ESSN: 1873-3956


Y(Ba1-xKx)2Cu3O7-δ ceramics (x = 0.00, 0.03, 0.05 and 0.08) were synthesized by thermal treatments of aqueous solution of metals nitrates and polyvinyl pyrrolidone (PVP) that acts as a capping agent. The effects of K-substitution on the crystal structure, microstructure and electrical resistance of samples were investigated. The X-ray diffractions results indicated an improvement of crystallinity and variation of lattice constant, a, b and c of YBa2Cu3O7-δ (Y123) phase with K-substitution. The K-substitution resulted in increasing of orthorhombicity factor compared to pure Y123. Microstructural observation using scanning electron microscopy showed that K-substitution promotes the grain growth of Y123. The superconducting transitions (Tc) of the substituted-samples were higher than that of the pure Y123. The Tc (onset) were 93, 97, 95, 95 K for the samples with x = 0.00, 0.03, 0.05 and 0.08, respectively. Comparing with pure sample, the substituted-samples showed sharper superconducting transition (ΔTc). The best superconducting properties was observed for sample with x = 0.03.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.ceramint.2017.05.339
Publisher: Elsevier
Keywords: Thermal treatment; Crystallinity; Critical temperature; Microstructure; Superconducting transition
Depositing User: Mohd Hafiz Che Mahasan
Date Deposited: 15 Oct 2018 03:01
Last Modified: 15 Oct 2018 03:01
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.ceramint.2017.05.339
URI: http://psasir.upm.edu.my/id/eprint/63305
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