Superconductivity and Structural of the New Er358 Materials

The Er358 superconductor was synthesized via the standard solid-state reaction method and demonstrated an average onset critical temperature of 95.48 K and an offset critical temperature of 89.70 K. Its crystal structure was classified into two groups: superconducting and non-superconducting compounds, possessing orthorhombic structures corresponding to the Pmmm and Pbnm space groups, respectively. The ratio of superconducting to non-superconducting compounds was 1:2, and their respective lattice parameters were a=3.8248 Å, b=3.8770 Å, c=31.666 Å, and a=7.1006 Å, b=12.139 Å, c=5.6418 Å. The samples exhibited smooth and dense surfaces, and their element distribution was analyzed via EDX mapping. The Cu2+/Cu3+ ratio was 0.0527, and the oxygen content deficiency was 0.300. The oxygen content was determined to be 17.7 using iodometric titration. Additionally, two endothermic peaks were observed in the heat reaction at 935°C and 1,050°C

Critical temperature of magnetic superconductors by two-band Ginzburg-Landau approach

In this research, we study the critical temperature of the two-band magnetic superconductor by Ginzburg-Landau (GL)approach in the absent of external magnetic field. There are four models of assumption used. We find the interband-to-bandratio on critical temperature formulas analytically. The critical temperature ratio decreased as the interband-to-band ratioincreased

The Study on the Critical Temperature and Gap-to-<i>T_c</i> Ratio of Yttrium Hydride Superconductors

This study investigates the gap-to-Tc ratio (R) of yttrium hydride superconductors within the weak coupling limit. We derived an analytical formula for the gap-to-Tc ratio. The ratio of the gap-to-Tc is dependent on the pressure applied to each superconductor. The maximum ratio, approximately 3.85, is observed in one superconductor, while the lowest ratio, roughly 3.21, is found in another superconductor. Based on the findings of our study, it can be deduced that yttrium hydride superconductors exhibit attributes commonly associated with weak-coupling superconductors. The influence of the Coulomb potential is more pronounced at a critical temperature compared to the ratio of the gap to the critical temperature