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

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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 - Sep 2004

All Science Journal Classification (ASJC) codes

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

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    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, 68(9), 648-655. https://doi.org/10.2320/jinstmet.68.648