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Substitutions in the Nd/Ba cation subsystem in thin films of the NdBa2Cu3Oy high-temperature superconductor (2000)

Mozhaev, P. B. ; Komissinskii, F. V. ; Ivanov, Z. G. ; [weitere]

Springer

Physics of the solid state 42 (2000), S. 1590-1595

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Details

ISSN: 1063-7834

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Thin films of the Nd1+x Ba2−x Cu3Oy high-T c superconductor (NBCO) with different neodymium/barium ratios have been obtained by laser ablative cosputtering of targets with different elemental compositions. The films with excess neodymium (x〉0) had a low surface particle density and were rough, but their critical temperature decreased with increasing x. Conversely, barium-rich films (x〈0) exhibited independence of the superconducting properties of the film composition, with an appreciable number of particles observed on the surface. Substitution of Ba for Nd in NBCO thin films is apparently impeded, so that excess barium precipitates in the form of (Ba,Cu)Oz particles. The structure and superconducting properties of NBCO reveal a strong dependence on the conditions of film saturation by oxygen.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1134/1.1309434

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