Preparation and microstructures of high-current density YBCO films by no-water post-annealing of precursor films including BaF2

Ataru Ichinose, Akihiro Kikuchi, Takanobu Kiss, Kyoji Tachikawa, Shirabe Akita, Kiyoshi Inoue

Research output: Contribution to journalConference article

Abstract

Precursor films are deposited on SrTiO3 single crystals at room temperature by the co-evaporation technique using Y, BaF2 and Cu as evaporation sources. Then, the precursor films are annealed in a low-pressure oxygen atmosphere without introduction of water vapor. A sample with a reflection high-energy electron diffraction (RHEED) pattern exhibiting some streaks, Kikuchi lines and Kikuchi zone, which resembles that of a single crystal, is successfully prepared. According to the cross-sectional TEM observation results, epitaxial growth of this YBCO film is achieved for the entire film thickness. The transport properties are measured using a small bridge with a width of 0.1 mm and a length of 1 mm by a standard four-probe method. The obtained YBCO film has a high Jc of over 1 MA/cm 2 at 77 K and a self-field. Furthermore, we discuss the relationship between the epitaxial YBCO layer thickness and the annealing conditions. Approximately 300- and 400-nm-thick epitaxial YBCO films are successfully prepared.

Original languageEnglish
Pages (from-to)927-931
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume392-396
Issue numberPART 2
DOIs
Publication statusPublished - Oct 1 2003
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: Nov 11 2002Nov 13 2002

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high current
Current density
Annealing
current density
preparation
microstructure
Microstructure
annealing
Water
water
Evaporation
Single crystals
Reflection high energy electron diffraction
evaporation
Epitaxial films
Epitaxial layers
Steam
Epitaxial growth
Thick films
Transport properties

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Preparation and microstructures of high-current density YBCO films by no-water post-annealing of precursor films including BaF2 . / Ichinose, Ataru; Kikuchi, Akihiro; Kiss, Takanobu; Tachikawa, Kyoji; Akita, Shirabe; Inoue, Kiyoshi.

In: Physica C: Superconductivity and its applications, Vol. 392-396, No. PART 2, 01.10.2003, p. 927-931.

Research output: Contribution to journalConference article

Ichinose, Ataru ; Kikuchi, Akihiro ; Kiss, Takanobu ; Tachikawa, Kyoji ; Akita, Shirabe ; Inoue, Kiyoshi. / Preparation and microstructures of high-current density YBCO films by no-water post-annealing of precursor films including BaF2 . In: Physica C: Superconductivity and its applications. 2003 ; Vol. 392-396, No. PART 2. pp. 927-931.
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AU - Kikuchi, Akihiro

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AU - Tachikawa, Kyoji

AU - Akita, Shirabe

AU - Inoue, Kiyoshi

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