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Titolo:
LASER-ABLATED YBCO THIN-FILMS - RELATIONS BETWEEN STRUCTURAL AND ELECTRICAL-PROPERTIES
Autore:
ZACH K; BORCK J; LINZEN S; KRAUSSLICH J; SCHMIDL F; SCHNEIDEWIND H; SEIDEL P;
Indirizzi:
FRIEDRICH SCHILLER UNIV JENA,INST SOLID STATE PHYS,HELMHOLTZWEG 5 O-6900 JENA GERMANY FRIEDRICH SCHILLER UNIV JENA,INST OPT & QUANTUMELECTR O-6900 JENA GERMANY
Titolo Testata:
Journal of alloys and compounds
fascicolo: 1-2, volume: 195, anno: 1993,
pagine: 199 - 202
SICI:
0925-8388(1993)195:1-2<199:LYT-RB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
5
Recensione:
Indirizzi per estratti:
Citazione:
K. Zach et al., "LASER-ABLATED YBCO THIN-FILMS - RELATIONS BETWEEN STRUCTURAL AND ELECTRICAL-PROPERTIES", Journal of alloys and compounds, 195(1-2), 1993, pp. 199-202

Abstract

YBCO thin films were prepared by laser ablation with a KrF-excimer laser (248 nm) on (100) SrTiO3-substrates. The aim of this work was to get smooth YBCO films with good superconducting properties for use in single-layer or multilayer Josephson elements. To study the relations between electrical and structural properties the influence of ablation parameters like oxygen partial pressure (P(O2)), substrate temperature(T(s)) and target to substrate distance (d) were investigated. To analyse the films X-ray diffraction, Rutherford backscattering (RBS) and Scanning electron microscopy (SEM) were used.We found a strong reproducible correlation between the position of the samples in the p(O2)-T(s)-diagram and their structural and electrical properties like c-axis orientation (FWHM of best samples < 0, 15-degrees), c-axis length, outgrowth density, critical temperature (T(Coff), for R=0) and current density at 77 K. The surface morphology strong correlates to the investigated parameters. In a parameter region of p(O2) approximately 70 Pa, T(s) approximately 720-degrees-C and d=4 cm we found outgrowth free smooth films with good superconducting properties. The results on single films were used to produce multilayer systems of YBCO-SrTiO3-YBCO on (100) SrTiO3-substrates.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 09:39:54