Doping effect of Pr6O11 on superconductivity and flux pinning of MgB2 bulk

Title	Doping effect of Pr6O11 on superconductivity and flux pinning of MgB2 bulk
Author(s)	Pan, X Shen, T Li, Guanzhong Cheng, Cui, Materials Science & Engineering, Faculty of Science, UNSW Zhao, Yong, Materials Science & Engineering, Faculty of Science, UNSW
Resource Type	Journal Article
Journal	Physica Status Solidi A-Applied Research; 2007; Vol:204; Issue:5; pp.1555-1560; ISSN:0031-8965
Published Version	http://dx.doi.org/10.1002/pssa.200622505
Description/Abstract	Bulk samples of MgB2 doped with 0, 1, 3, and 5 wt% Pr6O11 nanopowder were prepared using a solid-state reaction route. The lattice constants of Pr6O11-doped MgB2 systematically increase with increasing doping level, indicating a partial substitution of Pr for Mg in the crystal structure, and consequently, the superconducting transition temperature, Tc, of MgB2 is slightly suppressed. At a low doping level of 1 wt% Pr6O11, the critical current density, Jc, and the irreversibility field, Hirr are improved. However, at higher doping levels, Pr6O11 doping seems harmful for the performance of MgB2 in high magnetic fields. It is argued that the effect of the doping mechanism of Pr6O11 on Tc and Jc is quite different from those of other rare-earth elements, such as Y or Dy.
Language	EN
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Publisher Statement	Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information	The journal Physica Status Solidi a Applied Research is published by WILEY-VCH Verlag GmbH & Co.
Citation Link	Please use this identifier to cite or link to this item: http://handle.unsw.edu.au/1959.4/38193
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