Study of the Physicochemical Properties of Superconducting Cuprates Implanted with Magnetic Ferrite Nanoparticles
Date
2024-06-10
Journal Title
Journal ISSN
Volume Title
Publisher
National Higher School of Technology and Engineering. Annaba
Abstract
This thesis investigates the multifaceted applications of cobalt ferrite (CFO) through the strategic incorporation of rare earth (RE) ions, such as La, Eu, Ce, and Gd, into its structure using the sol-gel method. The study systematically analyses the resulting changes in structural and magnetic properties through various characterization techniques, including XRD, SEM-EDX, Raman spectroscopy, and DSC/TGA. The magnetic properties of the synthesized nanomaterials are evaluated using VSM, revealing a systematic decrease in saturation magnetization and an increase in coercivity with RE doping. The second part explores the impact of CoFe2O4-doped Eu nanoparticles on the superconducting properties of YBCO. Different concentrations of nanoparticles are incorporated, leading to enhanced structural, morphological, and magnetic properties as confirmed by XRD, SEM, VSM, and magnetic susceptibility measurements. The addition of nanoparticles preserves the crystalline structure and significantly improves flux pinning, resulting in increased critical current density (Jc) at 77K under an external magnetic field. XAS elucidates electronic and atomic interactions, correlating with observed superconducting enhancements. Additionally, the study sheds light on the antibacterial potential of YBCO nanoparticles against specific pathogens, showcasing resilient resistance of bacterial strains. The comprehensive approach underscores the multifunctional nature of these nanocomposites and their potential for advanced applications in biomedicine, diagnostics, and superconducting technologies.