We report infrared reflection measurements on Y1Ba2Cu3O7-δ/Pr 0.5Y0.5Ba2Cu3O7-δ (60Å/60Å, 16 layers and 60Å/24Å, 16 layers on SrTiO3 (100) substrate) high Tc superconducting superlattice films. We measured absorption spectrum of these films from 30 - 700 cm-1(3.7 - 66.9 meV) and 80 - 300 K. These films showed resistive superconducting transitions with an on set at 80 K. Some of the phonons are smear out because of strong electron-phonon mediation. The appearance of vibration modes are around 547, 361, 279, 172, 150, 125 cm-1 at 80 K. Some contribution and interaction between layers were observed from measured spectra. The different configuration of interlayer thickness of these superlattices have 1-2 cm-1 peaks shift in spectra. The dielectric and electron-phonon behaviors due to interaction of superlattice layers will go further studies.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering