Ultra thin film of Bi cuprate grown by a low temperature molecular beam epitaxy

Maki Kawai, Akihisa Yanase, Ziyuan Liu, Masami Mori, Shunji Watanabe, Takashi Hanada

Research output: Contribution to journalArticle

Abstract

Structural and physical properties of ultra thin films of Bi2Sr2CuO6 and Bi2(Sr,Ca)3Cu2O8 formed by a low temperature (<673 K) molecular beam epitaxy (MBE) method using 10-5Pa of NO2 as an oxidant are presented. On the substrates with less than 3% lattice mismatch, epitaxial growth from the substrate surface is realized, resulting in the formation of strained lattices. For the substrate with a big lattice mismatch of 10% (MgO), the observed lattice constants were similar to that for the bulk material. A superconducting transition with the onset Tc of 90K and the zero-resistance of 40K was obtained for the Bi2(Sr,Ca)3Cu2Ox/MgO(100) by post annealing at 1093K with O2. The optical absorption of the film indicate that annealing with O2 gives rise to an increase in the carrier concentration.

Original languageEnglish
Pages (from-to)2057-2058
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume185-189
Issue numberPART 3
DOIs
Publication statusPublished - 1991 Dec 1
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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