Different Pr[sup 3+] environments in Pr[sub 1. 85]Ce[sub 0. 15]CuO[sub 4]: A Raman crystal-field excitation study
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Instituto de Fisica Gleb Wataghin,'' Universidade Estadual de Campinas, 13083-970 Campinas, Sao Paulo (Brazil)
- San Diego State University, San Diego, California 92182 (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Low-temperature Raman scattering of crystal-field (CF) excitations within the Pr[sup 3+] ground-state [sup 3]H[sub 4] multiplet of the compound Pr[sub 1.85]Ce[sub 0.15]CuO[sub 4] suggests the presence of more than one CF environment for the Pr[sup 3+] ions. The Raman spectra were similar to spectra obtained in inelastic neutron-scattering experiments. The analysis of the Raman spectra for Pr[sub 1.85]R[sub 0.15]CuO[sub 4] samples with [ital R]=Pr, La, Y, Ce, and Th indicates three different environments for Pr[sup 3+]. One is associated with charge transfer caused by the replacement of Pr[sup 3+] by the tetravalent ions Ce[sup 4+] or Th[sup 4+]. A second is almost identical to that observed in Pr[sub 2]CuO[sub 4]. The third is attributed to either an orthorhombic distortion or to sites of smaller lattice volume. The Nd- and Nd(Ce)-based compounds are also discussed.
- OSTI ID:
- 6721405
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 51:2; ISSN PRBMDO; 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
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL FIELD
HIGH-TC SUPERCONDUCTORS
IONS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM IONS
PRASEODYMIUM OXIDES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
CERIUM COMPOUNDS
CERIUM OXIDES
CHALCOGENIDES
CHARGED PARTICLES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL FIELD
HIGH-TC SUPERCONDUCTORS
IONS
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM IONS
PRASEODYMIUM OXIDES
RAMAN SPECTRA
RARE EARTH COMPOUNDS
SPECTRA
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
TRANSITION ELEMENT COMPOUNDS