Speaker
Description
Thallium-based cuprates, particularly Tl-1223, are of significant interest due to their high critical temperature (~120 K) and their potential for applications in extreme environments. In this study, nearly pure Tl-1223 superconducting films were successfully synthesized by laser ablation or electrochemical deposition to deposit precursors onto single-crystal or texturing templates, followed by high-temperature treatments (up to 950°C) under moderate high-pressure conditions (up to 50 bar) to minimize thallium loss. Tl-1223’s ability to maintain superconducting properties over a wide temperature range confirms its suitability for applications requiring low surface resistance in high magnetic fields. The produced films, approximately 1 μm thick and deposited on lanthanum aluminate single crystals, exhibit biaxial texture. Growth mechanisms and crystallographic orientation were investigated using Electron Backscatter Diffraction (EBSD) and High-Resolution X-ray Diffraction (HRXRD), as a function of different deposition parameters and thicknesses. Transport measurements under magnetic fields up to 16 T, along with RF surface resistance measurements up to 12 T, allowed the estimation of key material parameters such as the irreversibility line and depinning frequencies, validating the material's robustness and its potential for next-generation particle accelerators and high-field RF applications.
The targeted material specifications have been successfully achieved; the study now advances towards the evaluation of scalability and applicability.
