Synthesis and Investigation of Superconducting Properties of High Entropy Er123 Cuprate Ceramics

The RE123 (RE=rare earth element) compound is a common form of high-temperature superconducting (HTSC) cuprate ceramic with chemical formula REBa2Cu3O7-δ. This compound makes an excellent superconductor due to its high critical temperature (Tc) in the low 90 Kelvin range, its high critical current density (Jc), stability, non-toxicity, and ease of synthesis. In this study, we aimed to investigate the effects of superconducting properties of ErBa2Cu3O7-δ when doped with 4 other RE ions of varying ionic radius. Samples of high-entropy(HE) oxide-type ErBa2Cu3O7-δ superconductors are prepared systematically using the solid-state reaction (SSR) method, and the sintering parameters for phase formation are determined. The crystal structure of the High Entropy-doped ErBa2Cu3O7-δ superconductors investigated. We will discuss the superconducting properties of these materials using DC magnetization and compare their critical temperature (Tc), critical field (Hc), and critical current density (Jc). We determined that with increasing orthorhombicity, we saw an increase in Tc, Hc, and Jc. We plan to investigate this relationship further with more acute doping on the RE site.