Abstract
In this study the samples were synthesized from a 2234 stoichiometric composition in order to obtain a large amount of pure 2212-BSCCO. The effects of Ni substitution on the properties of Bi-based Bi2−x Ni x Sr2Ca1Cu2O y superconductor with x=0, 0.05, 0.1 and 0.2 were investigated by means of X-ray analysis (XRD), DC electrical resistivity and magnetic-hysteresis loop measurements. It has been found that the T c (onset) transition temperature does not change independently of Ni content. In addition, J c values of the samples were calculated from the hysteresis loop measurement by using Bean’s model, showing that J c decreases with increasing Ni substitution.
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Acknowledgements
I am very thankful to Prof. A. Sotelo, Prof. M.A. Madre and Prof. Xermán F. de la Fuente Leis, Instituto de Ciencia de Materiales de Aragón-ICMA (CSIC-Universidad de Zaragoza), and Prof. B. Özçelik from Çukurova University for their encouragement.
All samples have been prepared in the MEİTAM Central Laboratory in Mersin University in Turkey. I wish to thank all MEİTAM staff for their helping and very meticulous working.
All 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 Mr. Ali Güzel, Dr. Pınar Tokmakkaya and Dr. Ibrahim Çam in the METU Central Laboratory for their experimental support and very meticulous work.
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Özkurt, B. Effects of Ni Substitution in Bi-2212 Superconductors. J Supercond Nov Magn 25, 1775–1779 (2012). https://doi.org/10.1007/s10948-012-1539-8
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DOI: https://doi.org/10.1007/s10948-012-1539-8