Neutron Diffraction Studies on La2-xDyxCa2xBa2Cu4+2xOz Superconductors

TL;DR

This study uses neutron diffraction to analyze the structural properties of Dy-substituted La-2125 superconductors across various doping levels, revealing no structural transition with increased Dy content.

Contribution

It provides detailed neutron diffraction analysis of La2-xDyxCa2xBa2Cu4+2xOz superconductors, demonstrating the stability of the tetragonal structure across doping levels.

Findings

All samples fit the tetragonal Y-123 model.

No structural transition observed with increased Dy doping.

Structural properties are consistent across the doping range.

Abstract

Structural studies on Dy-substituted La-2125 type superconductors have been carried out by neutron diffraction experiments at room temperature using a monochromatic neutron beam of wavelength lambda = 1.249 Angstroms. A series of samples with La2-xDyxCa2xBa2Cu4+2xOz stoichiometric composition, for x = 0.1 - 0.5, have been studied for their structural properties. A tetragonal Y-123 unit cell was taken as the starting model for the Rietveld analysis. All the samples fit into the starting model, exhibiting no structural transition taking place with increasing dopant concentration. The results of Rietveld analysis and structural properties are discussed in detail.