Characterizing the superconducting-to-normal transition in Mo/Au transition-edge sensor bilayers

S. J. Smith, S. R. Bandler, A. D. Brown, J. A. Chervenak, E. Figueroa-Feliciano, F. Finkbeiner, N. Iyomoto, R. L. Kelley, C. A. Kilbourne, F. S. Porter, J. E. Sadleir

研究成果: Contribution to journalArticle査読

18 被引用数 (Scopus)

抄録

We are developing arrays of Mo/Au bilayer transition-edge sensors (TES's) for future X-ray astronomy missions such as NASA's Constellation-X. The physical properties of the superconducting-to-normal transition in our TES bilayers, while often reproducible and characterized, are not well understood. The addition of normal metal features on top of the bilayer are found to change the shape and temperature of the transition, and they typically reduce the unexplained 'excess' noise. In order to understand and potentially optimize the properties of the transition, we have been studying the temperature, widths and current dependence of these transitions. We report on the characterization of devices both deposited on silicon substrates and suspended on thin silicon nitride membranes. This includes key device parameters such as the logarithmic resistance sensitivity with temperature α, and the logarithmic resistance sensitivity with current β, and their correlation with excess noise.

本文言語英語
ページ(範囲)195-200
ページ数6
ジャーナルJournal of Low Temperature Physics
151
1-2 PART 1
DOI
出版ステータス出版済み - 4 2008
外部発表はい

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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