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Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ superconductors: a study of microstructure and resistive transitions in a dc magnetic field

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dc.contributor.author Chaudhuri, Sukalpa
dc.contributor.author Gupta, Anurag
dc.contributor.author Ganesan, V.
dc.contributor.author Das, I.
dc.contributor.author Kumar, Anil
dc.contributor.author Zaleski, A. J
dc.contributor.author Narayan, Himanshu
dc.contributor.author Narlikar, A. V.
dc.date.accessioned 2016-12-08T16:25:45Z
dc.date.available 2016-12-08T16:25:45Z
dc.date.issued 2001-10-15
dc.identifier.issn 1361-6668 (e)
dc.identifier.issn 0953-2048 (p)
dc.identifier.uri http://repository.tml.nul.ls/handle/123456789/1144
dc.description.abstract We report an investigation of structure by x-ray diffraction, microstructure by atomic force microscopy (AFM) and broadening of resistive transitions in high dc magnetic fields (0–20 kOe) in Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ (y = 0.1, 0.2; and 0 x 0.20) ceramic superconductors. The XRD shows that the presence of Ca does not alter the known effect of Fe/Zn substitution on the structure of the pure (y = 0) system. Substitution of both Fe and Zn leads to a decrease in the grain size and micro-hardness. Interesting results were obtained on the influence of various dopants on the broadening of resistive transitions in dc magnetic fields, in general: (1) an increase in Ca content suppresses it; (2) Zn substitution has no effect; and (3) Fe substitution enhances it. We show that these results can be interpreted in terms of a thermally activated flux motion (TAFM), and the effect of various dopants on the properties like pinning barrier and anisotropy. en_ZA
dc.language.iso en en_ZA
dc.publisher IOP Publishing Ltd en_ZA
dc.rights © 2001 IOP Publishing Ltd en_ZA
dc.source Superconductor Science and Technology, Volume 16, (2001) 937–943 en_ZA
dc.title Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ superconductors: a study of microstructure and resistive transitions in a dc magnetic field en_ZA
dc.type Article en_ZA


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