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Title: Phonon-scattering spectra of (Eu sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 Eu sub 1/3 ) sub 2 Cu sub 3 O sub 9 and (Er sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 La sub 1/3 ) sub 2 Cu sub 3 O sub 9

Abstract

Raman-scattering spectra of (Eu{sub 2/3}Ce{sub 1/3}){sub 2}(Ba{sub 2/3}Eu{sub 1/3}){sub 2}Cu{sub 3}O{sub 9} and (Er{sub 2/3}Ce{sub 1/3}){sub 2}(Ba{sub 2/3}La{sub 1/3}){sub 2}Cu{sub 3}O{sub 9}, both of which have Cu-O{sub 5} pyramid structure, as well as YBa{sub 2}Cu{sub 3}O{sub 7}, have been observed at room temperature with use of single crystals. A scattering peak with {ital B}{sub 1{ital g}} symmetry has been observed at around 180 cm{sup {minus}1} and peaks with {ital A}{sub 1{ital g}} symmetry at around 220, 290, 450, and 540 cm{sup {minus}1}, in both compounds. The 180-cm{sup {minus}1} peak with {ital B}{sub 1{ital g}} symmetry is assigned to the out-of-phase bending of oxygen in the Cu-O{sub 2} plane and the 540-cm{sup {minus}1} peak with {ital A}{sub 1{ital g}} symmetry to the stretching of apical oxygen. Phonon-energy calculation has been performed with use of ionic potentials obtained for YBa{sub 2}Cu{sub 3}O{sub 7}. To explain the observed {ital B}{sub 1{ital g}} phonon energies, it has been found that the polarizability of the oxygen in the Cu-O{sub 2} plane in these compounds must be increased in relation to that in YBa{sub 2}Cu{sub 3}O{sub 7}. The 220- and 290-cm{sup {minus}1} peaks are tentatively assigned to the mixed vibrational modes of oxygens in the Cu-O{submore » 2} plane and lanthanide atoms.« less

Authors:
; ; ; ; ; ; ; ;  [1]
  1. Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo 135, Japan (JP)
Publication Date:
OSTI Identifier:
5682079
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter; (USA)
Additional Journal Information:
Journal Volume: 44:2; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; RAMAN SPECTROSCOPY; CERIUM OXIDES; COPPER OXIDES; ERBIUM OXIDES; EUROPIUM OXIDES; HIGH-TC SUPERCONDUCTORS; LANTHANUM OXIDES; CRYSTAL STRUCTURE; PHONONS; TRANSITION TEMPERATURE; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CERIUM COMPOUNDS; CHALCOGENIDES; COPPER COMPOUNDS; ERBIUM COMPOUNDS; EUROPIUM COMPOUNDS; LANTHANUM COMPOUNDS; LASER SPECTROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUASI PARTICLES; RARE EARTH COMPOUNDS; SPECTROSCOPY; SUPERCONDUCTORS; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; 360204* - Ceramics, Cermets, & Refractories- Physical Properties; 656100 - Condensed Matter Physics- Superconductivity

Citation Formats

Yoshida, M, Tajima, S, Mizuo, Y, Wada, T, Ichinose, A, Yaegashi, Y, Koshizuka, N, Yamauchi, H, and Tanaka, S. Phonon-scattering spectra of (Eu sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 Eu sub 1/3 ) sub 2 Cu sub 3 O sub 9 and (Er sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 La sub 1/3 ) sub 2 Cu sub 3 O sub 9. United States: N. p., 1991. Web. doi:10.1103/PhysRevB.44.782.
Yoshida, M, Tajima, S, Mizuo, Y, Wada, T, Ichinose, A, Yaegashi, Y, Koshizuka, N, Yamauchi, H, & Tanaka, S. Phonon-scattering spectra of (Eu sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 Eu sub 1/3 ) sub 2 Cu sub 3 O sub 9 and (Er sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 La sub 1/3 ) sub 2 Cu sub 3 O sub 9. United States. doi:10.1103/PhysRevB.44.782.
Yoshida, M, Tajima, S, Mizuo, Y, Wada, T, Ichinose, A, Yaegashi, Y, Koshizuka, N, Yamauchi, H, and Tanaka, S. Mon . "Phonon-scattering spectra of (Eu sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 Eu sub 1/3 ) sub 2 Cu sub 3 O sub 9 and (Er sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 La sub 1/3 ) sub 2 Cu sub 3 O sub 9". United States. doi:10.1103/PhysRevB.44.782.
@article{osti_5682079,
title = {Phonon-scattering spectra of (Eu sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 Eu sub 1/3 ) sub 2 Cu sub 3 O sub 9 and (Er sub 2/3 Ce sub 1/3 ) sub 2 (Ba sub 2/3 La sub 1/3 ) sub 2 Cu sub 3 O sub 9},
author = {Yoshida, M and Tajima, S and Mizuo, Y and Wada, T and Ichinose, A and Yaegashi, Y and Koshizuka, N and Yamauchi, H and Tanaka, S},
abstractNote = {Raman-scattering spectra of (Eu{sub 2/3}Ce{sub 1/3}){sub 2}(Ba{sub 2/3}Eu{sub 1/3}){sub 2}Cu{sub 3}O{sub 9} and (Er{sub 2/3}Ce{sub 1/3}){sub 2}(Ba{sub 2/3}La{sub 1/3}){sub 2}Cu{sub 3}O{sub 9}, both of which have Cu-O{sub 5} pyramid structure, as well as YBa{sub 2}Cu{sub 3}O{sub 7}, have been observed at room temperature with use of single crystals. A scattering peak with {ital B}{sub 1{ital g}} symmetry has been observed at around 180 cm{sup {minus}1} and peaks with {ital A}{sub 1{ital g}} symmetry at around 220, 290, 450, and 540 cm{sup {minus}1}, in both compounds. The 180-cm{sup {minus}1} peak with {ital B}{sub 1{ital g}} symmetry is assigned to the out-of-phase bending of oxygen in the Cu-O{sub 2} plane and the 540-cm{sup {minus}1} peak with {ital A}{sub 1{ital g}} symmetry to the stretching of apical oxygen. Phonon-energy calculation has been performed with use of ionic potentials obtained for YBa{sub 2}Cu{sub 3}O{sub 7}. To explain the observed {ital B}{sub 1{ital g}} phonon energies, it has been found that the polarizability of the oxygen in the Cu-O{sub 2} plane in these compounds must be increased in relation to that in YBa{sub 2}Cu{sub 3}O{sub 7}. The 220- and 290-cm{sup {minus}1} peaks are tentatively assigned to the mixed vibrational modes of oxygens in the Cu-O{sub 2} plane and lanthanide atoms.},
doi = {10.1103/PhysRevB.44.782},
journal = {Physical Review, B: Condensed Matter; (USA)},
issn = {0163-1829},
number = ,
volume = 44:2,
place = {United States},
year = {1991},
month = {7}
}