Abstract
Increase in flux pinning strength of Cu\(_{0.5}\)Tl\(_{0.5}\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{10-\delta }\)(CuTl-1223) superconductor has been observed after addition of Cr nanoparticles. We have thoroughly investigated the infield response of Cr nanoparticles-added CuTl-1223 superconductor in an external applied magnetic field in the range of 0–7 T. Solid-state reaction technique has been employed to synthesize (Cr)\(_{x}\)–CuTl-1223; x = 0–1.00 wt% nanoparticle–superconductor composites. The flux pinning mechanism has been analyzed on the basis of thermally activated flux flow model in the presence of a small current (10 \(\upmu \)A). The increase in activation energy and decrease in transition width of CuTl-1223 superconducting phase show the enhancement in its flux pinning strength upon the addition of Cr nanoparticles.
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Acknowledgments
Higher Education Commission of Pakistan (HEC) is thanked for financial supports through the Project No. 20-1482/R&D/09-1472. Authors are also highly thankful to Prof. Qiu Xiang-Gang, Beijing National Laboratory of Condensed Matter Physics, the Institute of Physics (IOP), the Chinese Academy of Sciences (CAS), Beijing, China, for providing the characterization facilities.
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Waqee-ur-Rehman, M., Mumtaz, M., Qasim, I. et al. Flux Pinning by Cr Nanoparticles in Cu\(_{0.5}\)Tl\(_{0.5}\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{10-\delta }\) Superconductor. J Low Temp Phys 184, 997–1006 (2016). https://doi.org/10.1007/s10909-016-1607-8
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DOI: https://doi.org/10.1007/s10909-016-1607-8