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Titolo:
Microstructure of YBa2Cu3O7-y films on CeO2-buffered Al2O3
Autore:
Develos, K; Yamasaki, H; Sawa, A; Nakagawa, Y; Ohshima, S; Mukaida, M;
Indirizzi:
AIST, Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan AIST Tsukuba Ibaraki Japan 3058568 chnol, Tsukuba, Ibaraki 3058568, Japan Yamagata Univ, Fac Engn, Yonezawa, Yamagata 9928510, Japan Yamagata Univ Yonezawa Yamagata Japan 9928510 wa, Yamagata 9928510, Japan
Titolo Testata:
PHYSICA C
, volume: 357, anno: 2001,
parte:, 2
pagine: 1353 - 1357
SICI:
0921-4534(200108)357:<1353:MOYFOC>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
YBCO THIN-FILMS; SURFACE OUTGROWTHS; LASER DEPOSITION; SAPPHIRE;
Keywords:
YBCO; CeO2; microstructure; pulsed laser deposition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Develos, K AIST, Natl Inst Adv Ind Sci & Technol, 1-1-1 Umezono,Tsukuba Cent 2, Tsukuba, Ibaraki 3058568, Japan AIST 1-1-1 Umezono,Tsukuba Cent 2 Tsukuba Ibaraki Japan 3058568
Citazione:
K. Develos et al., "Microstructure of YBa2Cu3O7-y films on CeO2-buffered Al2O3", PHYSICA C, 357, 2001, pp. 1353-1357

Abstract

We investigated the microstructure of epitaxial c-axis oriented YBCO filmslaser-deposited onto CeO2-buffered Al2O3 substrates. Using transmission electron microscopy (TEM), scanning electron microscopy and Auger electron spectroscopy, we have identified the majority of outgrowths which are spherical or polygonal in shape, with sizes ranging from 0.1 to 0.5 mum. as havingthe same composition as that of the YBCO matrix. Another type of outgrowthwith irregular shapes and sizes ranging from 0.5 to 1.0 mum was also foundto have a composition of BaCuO2 or CuO. Combined scanning transmission electron microscopy and selective area electron diffraction measurements identified the former as slightly misaligned YBCO. Although there is a large number of surface outgrowths in the YBCO film, the critical current density J(c) as calculated from hysteretic magnetization measurements is relatively high, where J(c) similar to 1.7 x 10(6) A cm(-2) at 77 K. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 29/03/20 alle ore 17:24:07