Abstract
In the present work, the influence of Yb substitution for Bi on the structural, electrical and magnetic properties of textured Bi-2212 ceramics has been investigated. X-ray diffraction studies indicated that the major peaks correspond to the Bi-2212 phase. The SEM images clearly show that there is an increase in the number of secondary phases with raising Yb content while all samples maintain similar grain morphology. Magnetic analysis of all samples has been done by magnetic hysteresis measurements, indicating that an enhancement in the M-H loops is obtained by a low Yb doping. The critical current density of samples was calculated from the M-H curves by using Bean’s critical state model, indicating that sample with 0.05 Yb substitution possesses the highest J c values.
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Acknowledgments
The authors wish to thank the Gobierno de Aragón and Fondo Social Europeo (Grupos de Investigacion Consolidados T12 and T87) and MINECO-FEDER (MAT2013-46505-C3-1-R) for financial support. SEM micrographs of all samples have been taken in Zaragoza University in Spain as XRD measurements have been made in the MEİTAM Central Laboratory at Mersin University. Also, R-T and M-H 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, we wish to thank PhD. M. Serkan YALÇIN 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., Özçelik, B., Madre, M.A. et al. Effect of Yb substitution in Bi-2212 ceramics prepared by laser floating zone technique. J Mater Sci: Mater Electron 26, 5761–5766 (2015). https://doi.org/10.1007/s10854-015-3134-9
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DOI: https://doi.org/10.1007/s10854-015-3134-9