Polarized Raman spectra of Y sub 2 BaCuO sub 5 : Normal-mode assignment from substitutions for Y and Ba

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.45.8046· OSTI ID:7113354

Abrashev, M V; Iliev, M N ^[1]

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1. Faculty of Physics, Sofia University, BG-1126 Sofia (Bulgaria)

Using the micro-Raman-spectroscopy technique, three types of phonon Raman spectra of {ital R}{sub 2}BaCuO{sub 5} ({ital R}=Y, Ho, Gd) and Y{sub 2}Ba{sub 0.5}Sr{sub 0.5}CuO{sub 5} corresponding to the main crystallographic directions were obtained in the range 100--700 cm{sup {minus}1} in both parallel and crossed polarizations. Comparing the line shifts upon cation substitution, the polarization properties of the three types of spectra, and taking into account the particular site environments, all {ital A}{sub {ital g}} lines were assigned to definite atomic vibrations.

• OSTI ID: 7113354
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 45:14; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BARIUM OXIDES
RAMAN SPECTRA
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
MATERIAL SUBSTITUTION
NORMAL-MODE ANALYSIS
POLARIZATION
VIBRATIONAL STATES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ENERGY LEVELS
EXCITED STATES
OXIDES
OXYGEN COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
665411* - Basic Superconductivity Studies- (1992-)
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)