Spatial Investigation on Structural Properties of GdBa2Cu3O7 − x Coated Conductors Grown on IBAD-MgO Based Stainless-Steel Substrates
The performance of high-temperature superconducting (HTS) wires has been studied for various substrates and buffer layers. Progress is still being made to search out new materials for use as superconducting layers, buffer layer, and substrates for HTS wires. Therefore, it is necessary to analyze the stacking structure of the commercial wires to enhance their performance. Among the industrial wires, GdBCO coated conductors on stainless-steel (STS) were studied in this paper. STS will be purchased at a competitive value, and so it is a promising substrate to be used in second generation (2G) HTS wires. To investigate structural properties of the GdBCO coated conductors on the STS substrate, many characterization tools are used. Scanning transmission electron microscopy (STEM) with energy dispersive spectroscopy (EDS) was used to research microstructure of films. Similarly, we tend to performed scanning laser microscopy on the conductors at space temperature to spot a map of the inhomogeneity positions. Raman scattering spectroscopy was also used to spot the secondary phases and to verify the phase formation within the films. The results of the analysis revealed the features of GdBCO coated conductors on STS for progress of HTS wires used particularly in rotating machines for high magnetic field applications.
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