Superconducting Properties of Bi_1.6Pb_0.4Sr₂Ca_2-xDy_xCu₃O_y Prepared via Co-Precipitation Method

Abstract:

The samples with nominal composition of Bi_1.6Pb_0.4Sr₂Ca _2-xDy_x Cu₃O_y where x = 0.000, 0.025, 0.050, 0.100 and 0.200 were prepared by the co-precipitation (COP) method. The samples were characterized by x-ray diffraction, electrical resistivity measurement and critical current density. The critical current density (J_C) and superconductivity transition temperature (T_C) of Dy substituted were found to be lower than the Dy-free sample. The T_C values vary between 100 K and 75 K toward Dy concentration due to a small change of carrier concentration. The highest TC in Dy-doped sample was found at 96 K in x = 0.025. The J_C decreased towards Dy substitution, and it was measured to be 5751.2 mA/cm2 in Dy-free and 3769.8 mA/cm² in x = 0.025 at 77 K. XRD analysis showed the substitutions of Dy reduced the volume fraction of the 2223 phase and increased the volume fraction of the 2212 phase. The proportion of Bi-2223/Bi-2212 (%) were estimated from 76.74/23.26 in Dy free to 18.90/81.10 in x = 0.200.

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 177-181
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.177
• Online since: December 2012
• Authors: H. Azhan, J.S. Hawa, K. Azman, H.N. Hidayah, S.Y.S. Yusainee
• Keywords: BSCCO, Dy Substitution, Phase Formation, Superconductor

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