Microstructure of MgB2 films deposited on YSZ/Hastelloy substrate

Satoshi Hata, Harini Sosiati, Yoshitsugu Tomokiyo, Noriyuki Kuwano, Akiyoshi Matsumoto, Masao Fukutomi, Hitoshi Kitaguchi, Kazunori Komori, Hiroaki Kumakura

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Microstructures of MgB2 films on yttria-stabilized-zirconia (YSZ) /Hastelloy substrates were studied by analytical transmission electron microscopy. The MgB2 films with Mg-rich compositions were fabricated by pulsed laser deposition followed by annealing at 600°C or 680°C under Ar atmosphere. Fine grains of MgB2 and MgO crystals 5-30 nm in size that shows a good mutual connectivity are formed in the MgB2 films. The MgB2 films also form voids 5-100 nm in size that may contain amorphous or oxide phases. Two-dimensional elemental analyses revealed that Mg and O atoms are enriched near the MgB2/YSZ interface. From a comparison in microstructures between the 600°C- and 680°C-annealed MgB2 films, it is suggested that the films composed of finer grains of MgB2 exhibit a higher critical current density under high magnetic fields.

Original languageEnglish
Pages (from-to)648-655
Number of pages8
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume68
Issue number9
DOIs
Publication statusPublished - Jan 1 2004

Fingerprint

Hastelloy (trademark)
Yttria stabilized zirconia
yttria-stabilized zirconia
microstructure
Microstructure
Substrates
Pulsed laser deposition
Oxides
pulsed laser deposition
voids
critical current
Annealing
Magnetic fields
current density
Transmission electron microscopy
atmospheres
Atoms
transmission electron microscopy
Crystals
annealing

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Microstructure of MgB2 films deposited on YSZ/Hastelloy substrate. / Hata, Satoshi; Sosiati, Harini; Tomokiyo, Yoshitsugu; Kuwano, Noriyuki; Matsumoto, Akiyoshi; Fukutomi, Masao; Kitaguchi, Hitoshi; Komori, Kazunori; Kumakura, Hiroaki.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 68, No. 9, 01.01.2004, p. 648-655.

Research output: Contribution to journalArticle

Hata, S, Sosiati, H, Tomokiyo, Y, Kuwano, N, Matsumoto, A, Fukutomi, M, Kitaguchi, H, Komori, K & Kumakura, H 2004, 'Microstructure of MgB2 films deposited on YSZ/Hastelloy substrate', Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, vol. 68, no. 9, pp. 648-655. https://doi.org/10.2320/jinstmet.68.648
Hata, Satoshi ; Sosiati, Harini ; Tomokiyo, Yoshitsugu ; Kuwano, Noriyuki ; Matsumoto, Akiyoshi ; Fukutomi, Masao ; Kitaguchi, Hitoshi ; Komori, Kazunori ; Kumakura, Hiroaki. / Microstructure of MgB2 films deposited on YSZ/Hastelloy substrate. In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2004 ; Vol. 68, No. 9. pp. 648-655.
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