Epitaxial growth of YBCO/MgO/YBCO structures

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5877632

Tanaka, S; Nakanishi, H; Matsaura, T; Higaki, K; Itozaki, H; Yasu, S ^[1]

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1. Sumitomo Electric Industries Ltd., Itami, Hyogo (Japan). Itami Research Div.

This paper investigates a Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}y} (YBCO)/MgO/Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}y} structure on a MgO (100) substrate was made and its crystallographic structure by cross-sectional transmission electron microscopy (TEM). A MgO ultrathin film with (100) orientation as an intermediate layer was obtained on each of the (001) and (100) YBCO thin films at the substrate temperature of about 400{degrees}C. The crystallinity of the MgO layer as a function of the MgO thickness was investigated. The randomness of the crystallinity decreased with a decrease in the thickness. A (100) epitaxial MgO layer without other orientation was obtained at a thickness of 10nm. From the results of cross-sectional TEM observation of the YBCO/MgO/YBCO structure, it was found that the thickness of the MgO can be reduced to 5 nm, sharp interfaces were observed without any disrupted portion. When the thickness was reduced to 2 nm, the interface top layer and the base layer were crushed.

• OSTI ID: 5877632
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DIMENSIONS
ELECTRON MICROSCOPY
EPITAXY
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
SUBSTRATES
THICKNESS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES