English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/117560
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Effect of Yb-substitution on thermally activated flux creep in the Bi2 Sr2 Ca1 Cu2-x Ybx Oy superconductors

AuthorsGündoğmus, H.; Özçelik, B.; Sotelo, A.; Madre, M. A.
Issue Date2013
CitationJournal of Materials Science: Materials in Electronics 24(7): 2568-2575 (2013)
AbstractIn the present work, Bi2 Sr2 Ca1 Cu 2-x Ybx Oy (x = 0.0, 0.05, 0.1, and 0.25) superconductors were prepared by a polymer matrix route technique, and subsequently used as feed in a laser induced directional solidification (LFZ) process. The X-ray diffraction, DC magnetization and magnetoresistance measurements were studied. All samples consist mainly of the Bi-2212 phase which indicates the performed process is adequate. However, some impurity phases like CaCuO2 were also detected. We have calculated the hole number using the relation given by Presland, and particle size, Lhkl, using the XRD patterns results. From M-T results, the superconducting transition temperatures, TC, of the samples were found 93, 90, 87, and 85 K, respectively. The activation energies, irreversibility fields (Hirr), upper critical fields (Hc2) and coherence lengths at 0 K (ζ(0)) were calculated from the resistivity versus temperature (R-T) curves, under DC magnetic fields up to 5 T. The thermally activated flux creep model has been studied in order to calculate the flux pinning energies. The results indicated that Hc2(0) varied from 132 to 30 T and the flux pinning energies varied from 650 to 400 meV at 0 T, with the content of Yb.
Publisher version (URL)http://dx.doi.org/10.1007/s10854-013-1135-0
Appears in Collections:(ICMA) Artículos
Files in This Item:
File Description SizeFormat 
Effect of Yb-substitution on thermally activated.pdf442,29 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.