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Título:
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Critical temperature depression and persistent photoconductivity in ion irradiated YBa2Cu3O7-x films and YBa2Cu3O7-x/PrBa2Cu3O7 superlattices
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Autores:
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Lucía Mulas, María Luisa ;
Sánchez Quesada, Francisco ;
Santamaría Sánchez-Barriga, Jacobo ;
Sefrioui, Zouhair ;
Arias Serna, Diego ;
Loos, G. ;
Navacerrada, M.A.
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Tipo de documento:
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texto impreso
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Editorial:
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Amer Inst Physics, 2000-05-29
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Electricidad
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Materia = Ciencias: Física: Electrónica
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Tipo = Artículo
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Resumen:
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We have studied the effect of He+ irradiation with doses in the range 10(12)-2x10(15) cm(-2) on two high-temperature superconducting structures: YBa2Cu3O7-x (YBCO) films and YBa2Cu3O7-x/PrBa2Cu3O7 (YBCO/PBCO) superlattices. In particular we have focused on superlattices [YBCON/PBCOM](1000 Angstrom) with N=1, 8 unit cells of YBCO, and M=5 unit cells of PBCO, with a total thickness of 1000 Angstrom. The analysis is presented in terms of depression of the critical temperature (T-c) and modification of the crystalline structure using X ray refinement technique. Single films show a systematic increase in the c-lattice parameter upon irradiation, which is not observed in thin one unit cell YBCO layers in superlattice structures. However, T-c depression resulting from irradiation is deeper in superlattices. These results are explained considering the strained nature of the as-grown [YBCON/PBCO5](1000 Angstrom) superlattices with low values of N. Both structures show persistent photoconductivity, indicating that defects are related to oxygen displacements in the Cu-O chains.
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En línea:
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https://eprints.ucm.es/id/eprint/27349/1/Lucia%2CML24libre.pdf
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