Er1−yCayBa2Cu3−x(Fe, Zn)xO7−δ superconductors: a study of microstructure and resistive transitions in a dc magnetic field
| 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.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.identifier.issn | 1361-6668 (e) | |
| dc.identifier.issn | 0953-2048 (p) | |
| dc.identifier.uri | http://repository.tml.nul.ls/handle/20.500.14155/1144 | |
| 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 |