Nb-doped SrTiO3 buffer layers on LaAlO3 substrates by metalorganic deposition for YBCO superconducting films
Materials Science and Engineering B: Solid-State Materials for Advanced Technology, cilt.110, sa.1, ss.94-102, 2004 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 110 Sayı: 1
- Basım Tarihi: 2004
- Doi Numarası: 10.1016/j.mseb.2004.03.012
- Dergi Adı: Materials Science and Engineering B: Solid-State Materials for Advanced Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.94-102
- Anahtar Kelimeler: Buffer layer, LAO, Nb-STO, PLD, Sol-gel, YBCO
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Hayır
Özet
The metalorganic deposition (MOD) method has been developed as a low-cost process for YBCO-coated conductor. In this study, Nb-doped SrTiO3 (Nb-STO) buffer layers have been fabricated on LaAlO3 (LAO) single crystal substrates by MOD using triethanol amine for YBCO films. The gel-coated substrates were dried on hot plate at 300°C for 5min in air and subsequently annealed at 1150°C for 10min under 4% H2-Ar gas flow. These films were extensively characterized by X-ray diffraction (XRD), pole figure XRD, atomic force microscope (AFM) and scanning electron microscope (SEM). It was found that highly textured, crack-free, smooth, homogenous and dense Nb-STO films with a strong (1 0 0) orientation on LAO substrate especially when using triethanol amine to improve the wettability of the coating solution. YBCO films have been deposited on the Nb-STO-buffered LAO substrates by pulsed laser deposition (PLD). It was also determined that YBCO films on Nb-STO-buffered LAO substrate had the transition temperature of 91 K. © 2004 Elsevier B.V. All rights reserved.