Dielectric properties of Cu0.5Tl0.5Ba2Ca2Cu3O10-δ superconductor added with nano-Fe2O3

Authors

Aly Abou-Aly, Professor, Faculty of Science, Alexandria University, Moharam Bek, Alexandria, EgyptFollow
Ibrahim Ibrahim, Professor, Faculty of Science, Alexandria University, Moharam Bek, Alexandria, EgyptFollow
Nayera Mohammed, Professor, Faculty of Science, Alexandria University, Moharam Bek, Alexandria, EgyptFollow
Mona Rekaby, Assistant Professor, Faculty of Science, Alexandria University, Moharam Bek, Alexandria, EgyptFollow

Keywords

(Cu0.5Tl0.5)-1223 phase, nano-Fe2O3, electrical resistivity, dielectric constants.

Disciplines

Architecture | Business | Engineering | Physical Sciences and Mathematics

Abstract

A series of high-temperature superconducting samples of type Cu0.5Tl0.5Ba2Ca2Cu3O10-δ, (Cu0.5Tl0.5)-1223, added with nano-Fe2O3 (0.0- 1.0 wt. %) was prepared by a solid-state reaction technique via short time preparation procedure and under ambient pressure. The prepared samples were characterized using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) for phase analysis and microstructure examination. The volume fraction results indicated that nano-Fe2O3 addition was significant in enhancing the formation rate of the (Cu0.5Tl0.5)-1223 phase, especially for x ≤ 0.2 wt. % samples. The electrical resistivity of the prepared samples was measured by the conventional four-probe technique from room temperature down to the zero superconducting transition temperature (T0). An increase in the superconducting temperature, Tc, is observed up to x = 0.2 wt. %, followed by a systematic decrease with increasing nano-Fe2O3 addition. The dielectric constants (ε' and ε''), dissipation factor (tan Δ) and real ac conductivity (σ'ac) were investigated as a function of temperature (113- 293 K) and frequency (102- 106 Hz). The results clarified that all these dielectric parameters show a strong dispersion with temperatures at low and moderate frequency ranges. Moreover, they are strongly dependent on nano-Fe2O3 addition. Furthermore, the high content of nano-Fe2O3 addition (x = 1.0 wt. %) enhanced ε' and reduced tan D of (Cu0.5Tl0.5)-1223 phase, which is a desirable demand for practical applications.

Recommended Citation

Abou-Aly, Aly; Ibrahim, Ibrahim; Mohammed, Nayera; and Rekaby, Mona (2020) "Dielectric properties of Cu0.5Tl0.5Ba2Ca2Cu3O10-δ superconductor added with nano-Fe2O3," BAU Journal - Science and Technology: Vol. 1: Iss. 2, Article 8.
DOI: https://doi.org/10.54729/2959-331X.1022

ISSN

2959-331X