Formation of superconductors by YAG laser irradiation of laminated thin layers

H. Wada, T. Kuroda, K. Itoh, M. Yuyama, M. Morita, M. Murakami, S. Matsuda

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

Abstract

An Nb tape was coated with a C layer of controlled thickness (5-10 μm) by magnetron sputtering. A YAG laser irradiated the tape in argon atmosphere. The beam power was 10-100 W, depending on the velocity of the tape, and the diameter of the beam was a few hundred microns. The resultant NbC tape showed superconductivity around 10 K. The same reaction conditions were used in a nitrogen atmosphere. Superconductivity in these tapes was found to start above 15 K. In the process for Nb3Al tapes an Nb tape was first coated with Al and then with C. The irradiation was performed under nearly the same reaction conditions as those for NbC. Superconductivity was found around 14 K, which is somewhat lower than values reported previously. This was attributed to an excess of C in the surface interstitially dissolved in the Nb3Al structure. In all cases phase identification and microstructure observation were carried out by X-ray diffractometry, optical microscopy, and scanning electron microscopy.

Original languageEnglish
Title of host publicationCONFERENCE ON LASERS AND ELECTRO-0PTICS
Editors Anon
PublisherPubl by IEEE
Pages354-356
Number of pages3
ISBN (Print)1557520860
Publication statusPublished - 1989 Dec 1
EventSummaries of Papers Presented at the Conference on Lasers and Electro-Optics - Baltimore, MD, USA
Duration: 1989 Apr 241989 Apr 28

Publication series

NameCONFERENCE ON LASERS AND ELECTRO-0PTICS

Other

OtherSummaries of Papers Presented at the Conference on Lasers and Electro-Optics
CityBaltimore, MD, USA
Period89/4/2489/4/28

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Wada, H., Kuroda, T., Itoh, K., Yuyama, M., Morita, M., Murakami, M., & Matsuda, S. (1989). Formation of superconductors by YAG laser irradiation of laminated thin layers. In Anon (Ed.), CONFERENCE ON LASERS AND ELECTRO-0PTICS (pp. 354-356). (CONFERENCE ON LASERS AND ELECTRO-0PTICS). Publ by IEEE.