N. Kuroda, F. Chida, Y. Sasaki, Y. Nishina, M. Kikuchi, A. Tokiwa, Y. Syono

Research output: Contribution to journalConference articlepeer-review


The superconducting energy gap, 2 DELTA , in YBa//2Cu//3O//6//. //7//4 has been measured directly by far-infrared absorption in small particles embedded homogeneously in 50 mu m-thick polyethylene films. The radius of the particle ranges from 3 to 6 mu m, the average being about 4 mu m. The measurements are performed at 295 K and 1. 6 K in the wavenumber range from 23 to 400 cm** minus **1. At 295 K, the absorption coefficient increases rapidly with increase in the wavenumber, but tends to level off above 300 cm** minus **1. If the temperature is lowered down to 1. 6 K, the absorption becomes undetectable at low wavenumbers. It begins to rise at 40-50 cm** minus **1.

Original languageEnglish
Pages (from-to)529-530
Number of pages2
JournalPhysica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics
Issue number1-3
Publication statusPublished - 1987 Dec 1
Externally publishedYes
EventProc of the Yamada Conf XVIII on Supercond in Highly Correl Fermion Syst - Sendai, Jpn
Duration: 1987 Aug 311987 Sept 3

ASJC Scopus subject areas

  • Engineering(all)


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