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Quantitative analysis of Y2BaCuO5 particle distribution in a melt-grown YBa2Cu3O7/Y2BaCuO5 bulk superconductor

A quantitative analysis of Y211 particle distribution in a Y123/211 (YBa2Cu3O7/Y2BaCuO5) bulk prepared by a top seeding melt-growth process was focused mainly on the measurement of Y211 particle concentration and Y211 particle size. The concentration and Y211 particle distribution were measured by image processing on the set of micrographs provided by an optical and a scanning electron microscope (SEM) from identical places of the sample. We confirmed that in the region with submicron Y211 particle size the measurement on the optical micrographs was comparable with the measurement on the SEM micrographs. It was shown that the line profile analysis on the pre-treated optical micrographs could be calibrated and used for Y211 concentration measurement.