TY - JOUR
T1 - Microstructure of MgB2 films deposited on YSZ/Hastelloy substrate
AU - Hata, Satoshi
AU - Sosiati, Harini
AU - Tomokiyo, Yoshitsugu
AU - Kuwano, Noriyuki
AU - Matsumoto, Akiyoshi
AU - Fukutomi, Masao
AU - Kitaguchi, Hitoshi
AU - Komori, Kazunori
AU - Kumakura, Hiroaki
PY - 2004/9
Y1 - 2004/9
N2 - 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.
AB - 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.
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U2 - 10.2320/jinstmet.68.648
DO - 10.2320/jinstmet.68.648
M3 - Article
AN - SCOPUS:9144230837
SN - 0021-4876
VL - 68
SP - 648
EP - 655
JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
IS - 9
ER -