Control of grain size by initial growth stage of YBCO thin films

Masashi Mukaida, S. Sato, Y. Takano, M. Kusunoki, S. Ohshima

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A grain size control technology will be described. YBa 2 Cu 3 O 7-δ thin films are grown by a pulsed laser deposition method in 400 mTorr oxygen atmosphere. The films are grown by a self-template method with various self-template growth temperatures. However the temperature of the main YBa 2 Cu 3 O 7-δ layer was fixed. Grain size of YBa 2 Cu 3 O 7-δ thin films on MgO substrates are observed by atomic force microscope. Mean diameter of grains are calculated by the number of grains in scanned area of 1 × 1 μm 2 . The mean diameters are 2.49 × 10 2 , 2.89 × 10 2 , 4.047 × 10 2 and 4.192 × 10 2 nm for films with an initial layer growth temperature of 670, 690, 714 and 730 °C, respectively. Grain size is found to depend on the initial growth stage of the YBa 2 Cu 3 O 7-δ thin film growth. These grain sizes have a strong relationship with the inverse of substrate temperature indicating thermally excited migration of YBa 2 Cu 3 O 7-δ nuclei. It is also clarified that migration length of YBa 2 Cu 3 O 7-δ nucleus is longer on an YBa 2 Cu 3 O 7-δ films than on MgO substrates.

Original languageEnglish
Pages (from-to)1232-1235
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume378-381
Issue numberPART 2
DOIs
Publication statusPublished - Oct 1 2002
Externally publishedYes

Fingerprint

grain size
Growth temperature
Thin films
Substrates
thin films
templates
Film growth
Pulsed laser deposition
nuclei
temperature
Microscopes
pulsed laser deposition
Temperature
Oxygen
microscopes
atmospheres
barium copper yttrium oxide
oxygen

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Control of grain size by initial growth stage of YBCO thin films. / Mukaida, Masashi; Sato, S.; Takano, Y.; Kusunoki, M.; Ohshima, S.

In: Physica C: Superconductivity and its applications, Vol. 378-381, No. PART 2, 01.10.2002, p. 1232-1235.

Research output: Contribution to journalArticle

Mukaida, Masashi ; Sato, S. ; Takano, Y. ; Kusunoki, M. ; Ohshima, S. / Control of grain size by initial growth stage of YBCO thin films. In: Physica C: Superconductivity and its applications. 2002 ; Vol. 378-381, No. PART 2. pp. 1232-1235.
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