A new approach using artificial substrates for growth of high-quality precipitate-free HTS thin films, toward electronic device applications

K. Endo, P. Badica, H. Sato, H. Akoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High quality thin films of HTS have been grown by MOCVD on substrates with artificial steps of predefined height and width. The surface of the films grown on the steps having width equal to the 'double of the migration length' of the atomic species depositing on the substrate is totally free of precipitates: precipitates are gathered at the step edges where the free energy is lowest. The method has several advantages: it is simple, universal (it is independent of the materials, substrates, deposition technique or application) and allows control of precipitates segregates so that the quality and growth conditions of the Films are the same as for the Films grown on conventional substrates. The method is expected to result in new opportunities for the device fabrication, design and performance. As an example we present successful fabrication of a mesa structure showing intrinsic Josephson effect. We have used thin Films of Bi-2212/Bi-2223 superstructure grown on (001) SrTiO3 single crystal substrates with artificial steps of 20μm.

Original languageEnglish
Title of host publicationRecent Advances in Superconductivity
Subtitle of host publicationMaterials Synthesis, Multiscale Characterization, and Functionally Layered Composite Conductors
PublisherMaterials Research Society
Pages24-30
Number of pages7
ISBN (Print)1558998225, 9781558998223
DOIs
Publication statusPublished - 2005
Externally publishedYes
Event2005 MRS Spring Meeting - San Francisco, CA, United States
Duration: 2005 Mar 282005 Apr 1

Publication series

NameMaterials Research Society Symposium Proceedings
Volume868
ISSN (Print)0272-9172

Other

Other2005 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period05/3/2805/4/1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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    Endo, K., Badica, P., Sato, H., & Akoh, H. (2005). A new approach using artificial substrates for growth of high-quality precipitate-free HTS thin films, toward electronic device applications. In Recent Advances in Superconductivity: Materials Synthesis, Multiscale Characterization, and Functionally Layered Composite Conductors (pp. 24-30). (Materials Research Society Symposium Proceedings; Vol. 868). Materials Research Society. https://doi.org/10.1557/proc-868-c4.4