Abstract
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 language | English |
|---|---|
| Pages (from-to) | 529-530 |
| Number of pages | 2 |
| Journal | Physica B: Physics of Condensed Matter & C: Atomic, Molecular and Plasma Physics, Optics |
| Volume | 148 |
| Issue number | 1-3 |
| Publication status | Published - 1987 Dec 1 |
| Externally published | Yes |
| Event | Proc of the Yamada Conf XVIII on Supercond in Highly Correl Fermion Syst - Sendai, Jpn Duration: 1987 Aug 31 → 1987 Sept 3 |
ASJC Scopus subject areas
- Engineering(all)