Abstract
Bi1.8Sr2AuxCa1.1Cu2.1Oy (Bi-2212) polycrystalline ceramics with x = 0.25, 0.3 and 0.35 have been prepared by the solid-state reaction method. XRD results showed the Bi-2212 phase as the major one in all samples, accompanied by metallic Au, and some secondary phases such as Bi2CaO4. Tc values are very similar for all samples, indicating that the carrier concentration is independent of the amount of Au. Magnetic properties of samples, determined through magnetic hysteresis measurements (M–H) performed at both T = 2 and 10 K, showed that samples maintain their diamagnetic characteristics in all cases. In addition, Jc values, calculated from their magnetic hysteresis loops using the Bean’s model, showed that addition of metallic Au in high contents leads to an important increase when compared to the samples with low Au content.
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Acknowledgements
This work is supported by the BAP Research Fund of Mersin University, Mersin, Turkey, under Grant Contracts No: 2016-2-TP2-1849. All samples have been prepared in the Energy Laboratory in Tarsus University in Turkey. Both SEM and XRD measurements have been made in the MEİTAM Central Laboratory in Mersin University. Other measurements in this study have been made in the METU Central Laboratory in Middle East Technical University in Ankara in Turkey. On the other hand, I wish to thank M.Sc. Aynur GURBÜZ and M.Sc. Seher KURU in the MEİTAM Central Laboratory and Dr. Ibrahim ÇAM in the METU Central Laboratory for their experimental support and very meticulous work.
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Özkurt, B. Effect of nano-sized metallic Au additions at large scale on the phase stability of Bi-2212 ceramics. J Mater Sci: Mater Electron 30, 14547–14553 (2019). https://doi.org/10.1007/s10854-019-01826-8
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DOI: https://doi.org/10.1007/s10854-019-01826-8