Structural and superconducting properties of EuBa₂Cu₃O_7 xthin films grown by off-axis pulsed laser deposition

Abstract

EuBa2Cu3O7−x thin films have been deposited by off-axis pulsed laser ablation on strontium titanate substrates. The effect of deposition temperature at reduced oxygen pressure on the microstructural and superconducting properties was investigated. X-ray diffraction measurements and Raman spectroscopy structural analyses have been carried out for identifying chemical and structural impurities and inhomogeneities on the film surfaces. The films exhibited a preferential c-axis growth, with the presence of a-axis component and orientation homogeneity depending on the deposition temperature. Critical currents investigated as a function of temperature and applied magnetic fields by means of magnetization measurement showed values of about 10 MA cm−2 at 5 K and 1 MA cm−2 at 77 K in zero applied magnetic field.

Synthesis and Characterization of LaBa2Cu3O7−δ System by Combustion Technique

“…The Raman spectrum of bulk LaBa 2 Cu 3 O 6.5 oxide at room temperature consists of several signals, and three of them were identified as the strongest and categorized as [25][26][27]. The frequency and shape of the phonon bands are consistent with component metal oxides, whereas the scattering intensities are strongly related to the scattering surface present in the volume illuminated by the laser beam.…”

Raman scattering spectroscopy of Nd1+xBa2−xCu3O7coated conductors grown by pulsed laser deposition

“…A careful analysis with SEM-EDS reveals that these outgrowths are composed of a Ba-Cu-rich phase. The Ba-Cu-rich outgrowths have also been reported in PLD-processed ReBCO films at a high temperature [11]. The phases are known to be formed because the materials were grown in the liquid phase assisted growing behaviors [12].…”