Fig. 1. The schematic of reel-to-reel tube furnace apparatus.
Fig. 2. The stability phase diagram of GdBCO for the nominal composition of Gd:Ba:Cu = 1:1:2.5 [15] with different fabrication process paths.
Fig. 3. The XRD patterns of the sample fabricated by RCE-DR in SuNAM (a), and the samples after growth at (b) 861°C, (c) 851°C, (d) 841°C, (e) 831°C, and (f) 821°C in 30 mTorr O2 for the growth of Gd2O3 and at 861°C in the PO2 of 150 mTorr for the conversion into GdBCO.
Fig. 4. The ρ-T curves for the GdBCO CC fabricated by RCE-DR in SuNAM (a), and also for GdBCO films grown at 861°C in 150 mTorr after the heat-treatment at (b) 861°C, (c) 851°C, (d) 841°C, (e) 831°C, and (f) 821°C in 30 mTorr for the size control of Gd2O3 particles.
Fig. 5. Z-contrast STEM micrographs of the sample (a) 861-861, (b) 841-861, and (c) 821-861, (1) Gd, (2) Ba, and (3) Cu elements spectral images analysed for the its samples, respectively.
Fig. 6. Z-contrast STEM micrograph of the sample (a) and (b) 821-861, (c) Gd, (d) Ba, and (e) Cu elements spectral images analysed for the sample 821-861.
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