{"id":48696,"date":"2026-03-15T15:00:58","date_gmt":"2026-03-15T15:00:58","guid":{"rendered":"https:\/\/uomosul.edu.iq\/en\/science\/?p=48696"},"modified":"2026-06-23T07:06:21","modified_gmt":"2026-06-23T07:06:21","slug":"masters-thesis-discusses-the-preparation-of-a-high-temperature-superconducting-compound","status":"publish","type":"post","link":"https:\/\/uomosul.edu.iq\/en\/science\/2026\/03\/15\/masters-thesis-discusses-the-preparation-of-a-high-temperature-superconducting-compound\/","title":{"rendered":"Master\u2019s Thesis Discusses the Preparation of a High-Temperature Superconducting Compound"},"content":{"rendered":"
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The Department of Physics at the College of Science \u2013 University of Mosul discussed a master\u2019s thesis on Sunday, 15 March 2026, titled:<\/p>\n

\u201cPreparation of the compound Bi\u2082\u208b\u2093Te\u2093Ba\u2082\u208b\u1d67Ce\u1d67Ca\u2082Cu\u2083O\u2081\u2080+\u03b4 as a high-temperature superconductor and studying the effect of single and double substitution on its structural, electrical, and dielectric properties.\u201d<\/strong><\/p>\n

The thesis was submitted by the student Ibrahim Aziz Ghulam<\/strong>.<\/p>\n

The study aimed to prepare different samples of the compound Bi\u2082\u208b\u2093Te\u2093Ba\u2082\u208b\u1d67Ce\u1d67Ca\u2082Cu\u2083O\u2081\u2080+\u03b4 using the solid-state reaction (SSR) technique, with an applied pressure of 7 tons\/cm\u00b2, and employing two thermal treatments\u2014sintering and annealing\u2014in order to investigate the effect of substitution on the structural, electrical, and dielectric properties of the compound.<\/p>\n

The effect of single substitution of tellurium (Te) for bismuth (Bi) at ratios x = 0, 0.1, 0.2, 0.3, and 0.4 was analyzed. X-ray diffraction (XRD) results showed that all samples exhibited a tetragonal crystal structure, with an increase in the lattice parameter (c) from 8.05 at x = 0.1 to 8.20 at x = 0.3, followed by a decrease to 8.10 at x = 0.4.<\/p>\n

Electrical measurements using the four-probe method revealed that tellurium substitution enhanced the superconducting critical temperatures, where Tc\u2081 increased from 128 K at x = 0 to 137 K at x = 0.3, while Tc\u2082 increased from 134.3 K to 142.6 K, with a slight decrease at x = 0.4.<\/p>\n

Dielectric measurements also showed improved energy storage and dissipation properties, with optimal performance observed at x = 0.3, where the real dielectric constant (\u03b5\u2032) increased while the imaginary dielectric constant (\u03b5\u2033) and energy loss decreased, indicating potential applications in high-temperature superconducting materials.<\/p>\n

The thesis committee was chaired by Prof. Dr. Abdul Karim Dahash Ali Muhimid<\/strong>, with membership of:<\/p>\n