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Titolo:
On the origin of surface outgrowths in pulsed-laser-deposited YBCO/CeO2/Al2O3 thin films
Autore:
Develos, KD; Yamasaki, H; Sawa, A; Nakagawa, Y;
Indirizzi:
Natl Ist Adv Ind Sci & Technol, AIST Tsukuba Cent 2, Energy Elect Inst, Supercond Technol Grp, Tsukuba, Ibaraki 3058568, Japan Natl Ist Adv Ind Sci &Technol Tsukuba Ibaraki Japan 3058568 58568, Japan
Titolo Testata:
PHYSICA C
fascicolo: 2, volume: 361, anno: 2001,
pagine: 121 - 129
SICI:
0921-4534(20010901)361:2<121:OTOOSO>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEO2 BUFFER LAYERS; MICROSTRUCTURE;
Keywords:
YBCO; CeO2; sapphire; interfacial reaction; outgrowth;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Develos, KD Natl Ist Adv Ind Sci & Technol, AIST Tsukuba Cent 2, Energy Elect Inst, Supercond Technol Grp, 1-1-1 Umezono, Tsukuba, Ibaraki 3058568, Japan Natl Ist Adv Ind Sci & Technol 1-1-1 Umezono Tsukuba Ibaraki Japan 3058568
Citazione:
K.D. Develos et al., "On the origin of surface outgrowths in pulsed-laser-deposited YBCO/CeO2/Al2O3 thin films", PHYSICA C, 361(2), 2001, pp. 121-129

Abstract

Superconducting epitaxial YBa2Cu3O7-delta (YBCO) films were grown by pulsed laser deposition on CeO2-buffered sapphire (Al2O3) substrates. Scanning transmission electron microscopy and energy dispersive X-ray spectrometry investigations of the outgrowths found in YBCO films revealed these to be comprised of a multiphase microstructure, emanating from interfacial reactionsof YBCO with the CeO2 film and the Al2O3 substrate. The surface outgrowthsare mostly composed of CuO and YCuO2 phases which have segregated at the top of BaCeO3, a product of the interfacial reaction of YBCO with CeO2. Cross-sectional transmission electron microscopy observations further revealed a BaAl2O4 phase formed beneath the BaCeO3 phase, including along the CeO2-Al2O3 interface. Despite the presence of these outgrowths, high critical current density J(c) values > 2.0 x 10(6) A/cm(2) were obtained. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/05/20 alle ore 17:06:28