2024-03-29T15:39:47Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/157502022-08-29T13:09:30Zcom_10261_46com_10261_3col_10261_299
DIGITAL.CSIC
author
Palacín, M. Rosa
author
Casañ Pastor, Nieves
author
Krämer, G.
author
Jansen, M.
author
Gómez-Romero, P.
funder
Dirección General de Investigación Científica y Técnica, DGICT (España)
funder
Generalitat de Catalunya
funder
Ministerio de Educación y Ciencia (España)
funder
Consejo Superior de Investigaciones Científicas (España)
funder
Karlsruhe Institute of Technology
2009-08-06T07:40:10Z
2009-08-06T07:40:10Z
1996-04-20
Physica C: Superconductivity 261(1-2): 71-80 (1996)
0921-453
http://hdl.handle.net/10261/15750
10.1016/0921-4534(96)00137-2
http://dx.doi.org/10.13039/501100002809http://dx.doi.org/10.13039/501100003339http://dx.doi.org/10.13039/100009133http://dx.doi.org/10.13039/501100008737
Several cationic substitutions have been performed on the series of layered perovskites Ln2Ba2Cu2Ti2O11 (Ln = La, Nd, Eu, Tb). The substitution attempts of the Ln ions that we performed were not successful. On the other hand K could be substituted for Ba and Sc, Al, Co, Zn and Cu for Ti. Nevertheless we found in all case a spontaneous loss of oxygen taking place upon substitution. This oxygen stoichiometry readjustment is such that leaves the oxides effectively undoped. Several attempts at oxidations nder high pressures of oxygen have been made, resulting oxygenation and doping of La2Ba2Cu2.15Ti1.85O11. Nevertheless this oxide does not present signs of superconductivity down to 4 K due most likely to the long Cu---O bond distance in its structure. Some n-type substitutions were also tried.
eng
closedAccess
Copper-titanium oxides
Layered perovskites
Doping
High-pressure
Cationic Substitutions and Doping in the Series of Layered Perovskites Ln2Ba2Cu2Ti2O11 (Ln=La,Nd,Eu,Tb)
artículo
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URL
https://digital.csic.es/bitstream/10261/15750/3/accesoRestringido.pdf
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accesoRestringido.pdf.txt