Polarized Raman measurements of Y sub 1 minus x Pr sub x Ba sub 2 Cu sub 3 O sub 7
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- IBM Research Division, Thomas J. Watson Research Center, Yorktown, Heights, NY (USA)
We report polarized Raman measurements on small single crystals embedded in Y{sub 1{minus}{ital x}}Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7} polycrystalline pellets. The measurements show two-mode behavior in the Cu-O bending mode of the CuO{sub 2} planes ({ital B}{sub 1{ital g}} mode). The increase in frequency with {ital x} of the Ba-Ba stretching mode and the chain copper--apical oxygen Cu(1)-O(4) stretching mode is consistent with hole localization on Ba sites due to Ba 5{ital d}--O 2{ital p} covalency. This localization may be related to the suppression of superconductivity in this compound, which increases with increasing {ital x}.
- OSTI ID:
- 6482990
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:7; ISSN PRBMD; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
HIGH-TC SUPERCONDUCTORS
OPTICAL MODES
OSCILLATION MODES
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
HIGH-TC SUPERCONDUCTORS
OPTICAL MODES
OSCILLATION MODES
OXIDES
OXYGEN COMPOUNDS
POLYCRYSTALS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES