Metal doping effects in NIR Raman spectra of YBCO epitaxial films

Metal doping effects in NIR Raman spectra of YBCO epitaxial films

Metal doping (Co, Zn) of YBCO epitaxial thin films leads to large changes of the scattering efficiencies of various lattice modes in near-infrared (NIR)-Raman spectra (1064 nm) if it is accompanied by a variation of the charge carrier concentration. The results resemble earlier observations in oxyge...

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Veröffentlicht in:Journal of Low Temperature Physics 1996-11, Vol.105 (3-4), p.767-771
Hauptverfasser: Guettler, B, Dewing, H, Skuja, L, Pindoria, G
Format: Artikel
Sprache:eng
Schlagworte:
BARIUM OXIDES
CARRIER DENSITY
CHARGE CARRIERS
COBALT
Composition effects
COPPER OXIDES
CRYSTAL DOPING
Doping (additives)
High temperature superconductors
HIGH-TC SUPERCONDUCTORS
Infrared spectroscopy
Lattice constants
MATERIALS SCIENCE
NEAR INFRARED RADIATION
Oxide superconductors
RAMAN EFFECT
Raman spectroscopy
SUPERCONDUCTING FILMS
YTTRIUM OXIDES
ZINC
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Zusammenfassung:Metal doping (Co, Zn) of YBCO epitaxial thin films leads to large changes of the scattering efficiencies of various lattice modes in near-infrared (NIR)-Raman spectra (1064 nm) if it is accompanied by a variation of the charge carrier concentration. The results resemble earlier observations in oxygen depleted YBCO thin films. In contrast, no effect is found when metal doping does not change the carrier concentration even if it leads to a massive T sub(c) suppression.
ISSN:0022-2291
1573-7357
DOI:10.1007/bf00768476