Near 100 K Superconductivity In GdBa2(CuMg)3O8+z Superconductor System

Abstract

High-temperature superconductors are known as materials that have been studied extensively for 35 years. Especially in recent years, important applications have started to be made in terms of the technological use of these materials. However, with the technological use of these materials studies are continuing on the discovery of new materials, both with doping or substitution to old high-temperature superconductor materials or as purely new superconductor materials. The GdBaCuO superconductors are also well-known materials among the high-temperature cuprates. In this work, we replaced the Cu with Mg atoms at a certain rate and characterized the superconducting properties of the materials. The GdBa2(CuMg)3O8+z materials, where x= 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6%, were prepared by the solid-state reaction method. it was found that the best superconducting properties were obtained in a 3% MgO substituted sample. The best superconducting transition temperature, Tc, was obtained to be 98.1 K and the best critical current density, Jcmag, value was calculated to be 5.5 x 106 A/cm at 4.2 K. Further experimental details, structural, electrical, and magnetic peculiarities were presented.