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/20.500.14155/1144 |
|
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 |