Molecular beam epitaxial growth of superconducting Ba2DyCu 3O6.5 thin films at 420°C using NO2 as an oxidant

Kei Ichiro Norimoto, Rika Sekine, Masami Mori, Takashi Hanada, Masahiro Kudo, Maki Kawai

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A superconducting Ba2DyCu3O6.5 (orthorhombic II phase) thin film is formed on a MgO(100) substrate at 420°C by molecular beam epitaxial growth using NO2 as an oxidant. Metal elements Ba, Dy, and Cu are sequentially supplied from K cells onto MgO(100) at 420°C under a flow of 5×10-5 Pa of NO2. The film gradually cooled in situ under the identical pressure of NO2 shows metallic behavior in the normal state and a Tczero of 50 K. The lattice constant of the c axis is observed at 11.75 Å, which is known as an orthorhombic II phase of bulk Ba2DyCu3O 6.5. Due to the slow deposition rate, the film thus formed is oriented with the c axis perpendicular to the surface in spite of the low-temperature growth condition.

Original languageEnglish
Pages (from-to)1971-1973
Number of pages3
JournalApplied Physics Letters
Volume61
Issue number16
DOIs
Publication statusPublished - 1992 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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