الفهرس 
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Abstract
With the invention of high temperature superconductors (HTSCs), significant efforts have been made through the development and use of various techniques to enhance their critical parameters [1]. Owing to its synthesis at atmospheric pressure and providing higher values of critical superconducting parameters such as transition temperature (Tc), irreversibility field (Hirr), critical current density (Jc) etc, Cu0.5Tl0.5Ba2Ca2Cu3O10-δ (CuTl-1223) is a desirable phase of the CuTl based HTSCs series [2-4]. For technical applications of HTSCs, high value of one of the most significant critical parameters which is Jc is needed and numerous techniques have been used for this purpose. Because of their highly anisotropic layered crystal structures, the Jc has been stated to be closely dependent on the microstructure of HTSCs. Different fabrication methods have been attempted to achieve highly directed materials [5-11] in order to enhance the microstructure. Vortex motion is the key cause of energy dissipation and removal of Jc [12-16] in externally applied magnetic fields in HTSCs. One method of strengthening Jc is to add, in particular, secondary phases or non-superconducting inclusions of artificial pinning centers, which may serve as isotropic and randomly distributed artificial pinning centers [17- 23]. As powerful pinning centers, dislocations, stacking faults, twin boundaries and oxygen defects may also work. The implementation of additional artificial pinning centers through the use of various nanostructures of different materials in bulk HTSCs is the most useful, effective and simple way to enhance infield Jc as well as other superconducting critical parameters [24, 25.