dc.contributor.author |
Escamilla, R |
|
dc.contributor.author |
Akachi, T |
|
dc.contributor.author |
Gomez, R |
|
dc.contributor.author |
Marquina, ML |
|
dc.contributor.author |
Ridaura, R |
|
dc.contributor.author |
Marquina, V |
|
dc.date.accessioned |
2011-01-22T10:27:24Z |
|
dc.date.available |
2011-01-22T10:27:24Z |
|
dc.date.issued |
2002 |
|
dc.identifier.issn |
0953-2048 |
|
dc.identifier.uri |
http://hdl.handle.net/11154/2516 |
|
dc.description.abstract |
In this paper, the effects produced by iron substitutions in the (Y0.9Ca0.1)Ba2Cu4-xFexO8 system on the Superconducting and structural properties are studied. The Rietveld-fit of the crystal structure and Mossbauer spectroscopy results of (Y0.9Ca0.1)Ba2Cu4-xFexO8 samples indicate that the iron atoms occupy the Cu(1) sites of the (Cu-O)(2) double chains in fivefold coordination at low iron concentrations. Besides at high iron concentrations the iron atoms occupy the Cu(I) sites of single Cu-O chains and Cu(2) sites in the CuO2 planes of the (Y0.9Ca0.1)Ba2Cu4O8 phase with structural defects. Simultaneously, as iron concentration increases, a faster decrease of T-c is observed in this material compared with the YBa2Cu3-xFexO7-delta system. According to the charge-transfer model proposed for YBa2Cu4O8 under pressure, the decrease in the Cu(1)-O(4) bond length in parallel to the increase in the Cu(2)-O(4) bond length may affect the charge-transfer mechanism leading to the suppression of T-c. |
en_US |
dc.language.iso |
en |
en_US |
dc.title |
Suppression of T-c in the (Y0.9Ca0.1)Ba2Cu4-xFexO8 system |
en_US |
dc.type |
Article |
en_US |
dc.identifier.idprometeo |
2165 |
|
dc.source.novolpages |
15(7):1074-1080 |
|
dc.subject.wos |
Physics, Applied |
|
dc.subject.wos |
Physics, Condensed Matter |
|
dc.description.index |
WoS: SCI, SSCI o AHCI |
|
dc.relation.journal |
Superconductor Science & Technology |
|