Abstract
We have studied the thermally activated flux creep in the newly fabricated superconductors Y3Ba5Cu8O18+δ and Gd3Ba5Cu8O18+δ with transition temperature above 100 K. The thermally activated flux creep model explains the electron share in the magnetoresistivity of the samples in the vicinity of transition temperature T c . The activation energy U in a magnetic field below 15 kOe has been calculated by the corrected thermally activated flux creep model; and the pinning energy is exponentially related to the magnetic field.
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Acknowledgements
The authors wish to thank S. Fallahi, M. Mazaheri, and H. Hadipour for assistance and discussions. This work was partially supported by the Physics of Advanced Materials Group (PAM).
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Part of this paper was presented at the 2nd Nat’l Conf. on Adv. in SC, Feb. 2010, Ahwaz, Iran, and appeared in the conf. Proceedings (Iran J. Phys. Res. 10, 91, 2010), which was copied without permission by A.R. Heidari et al. (Materials 5, 882, 2012), but later retracted (ibid. p. 2816) with a plagiarism note.
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Aliabadi, A., Akhavan-Farshchi, Y. & Akhavan, M. Flux Dynamics in Y358 and Gd358 Superconductors. J Supercond Nov Magn 27, 741–748 (2014). https://doi.org/10.1007/s10948-013-2367-1
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DOI: https://doi.org/10.1007/s10948-013-2367-1