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Oxidation Mechanism of the Surface of A15 Superconductors

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Advances in Cryogenic Engineering Materials

Part of the book series: Advances in Cryogenic Engineering ((ACRE,volume 30))

Abstract

The oxidation process of the surface of the superconductors is usually employed in the fabrication of the Josephson tunnel junctions1–6. In the case of A15 superconductors such as Nb3Ge, Nb3Sn, Nb3A1, Nb3Si and V3Si, the native oxide is not always a good tunnel barrier. One case (Nb3Sn and Nb3A1) it is good, in other case (Nb3Ge and V3Si) it is not.1–5 In order to clarify the reason, the oxidation process of the surface of the A15 superconductors was studied by the in-situ observation of x-ray photoelectron spectroscopy (XPS). The XPS technique can reveal nondestructively the composition, thickness,quality of the oxide layer. This is one of the most promising techniques for investigating the structure of the native oxide-layer and tunnel barrier within a thickness of about 5 nm.

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Author information

Authors and Affiliations

  1. Electrotechnical Laboratory, Sakura-mura, Niihari-gun, Ibaraki, Japan

    H. Ihara, Y. Kimura, H. Okumura, K. Senzaki & S. Gonda

Authors
  1. H. Ihara
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  2. Y. Kimura
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  3. H. Okumura
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  4. K. Senzaki
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  5. S. Gonda
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Editor information

Editors and Affiliations

  1. U.S. Department of Commerce, National Bureau of Standards, Boulder, Colorado, USA

    A. F. Clark  & R. P. Reed  & 

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© 1984 Springer Science+Business Media New York

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Ihara, H., Kimura, Y., Okumura, H., Senzaki, K., Gonda, S. (1984). Oxidation Mechanism of the Surface of A15 Superconductors. In: Clark, A.F., Reed, R.P. (eds) Advances in Cryogenic Engineering Materials . Advances in Cryogenic Engineering, vol 30. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9868-4_65

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  • DOI: https://doi.org/10.1007/978-1-4613-9868-4_65

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-9870-7

  • Online ISBN: 978-1-4613-9868-4

  • eBook Packages: Springer Book Archive

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