Tilting of the CuO{sub 6} octahedra in La{sub 1.83{minus}{ital x}}Eu{sub 0.17}Sr{sub {ital x}}CuO{sub 4} as seen by {sup 151}Eu M{umlt o}ssbauer spectroscopy
- II. Physikalisches Institut, Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Koeln (Germany)
{sup 151}Eu M{umlt o}ssbauer studies of La{sub 1.83{minus}{ital x}}Eu{sub 0.17}Sr{sub {ital x}}CuO{sub 4} for 0{le}{ital x}{le}0.26 exhibit a quadrupole interaction at the Eu site whose magnitude {ital eQV}{sub {ital zz}} strongly depends on both the Sr content {ital x} and the temperature {ital T}. For a fixed temperature, a linear relationship is obtained between the quadrupole interaction and the averaged CuO{sub 6} octahedra tilting angle determined from diffraction studies. The unusually large temperature dependence of {ital eQV}{sub {ital zz}} strongly indicates a temperature dependence of the local structure. In contrast to recent studies of the local structure La{sub 2}CuO{sub 4}-type superconductors by means of x-ray-absorption and neutron-scattering techniques, our data give strong evidence that the local octahedra tilting in La{sub 1.83{minus}{ital x}}Eu{sub 0.17}Sr{sub {ital x}}CuO{sub 4} corresponds well to the average tilting obtained by diffraction techniques. {copyright}{ital 1996 The American Physical Society.}
- OSTI ID:
- 285984
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CUPRATES
ELECTRIC MOMENTS
EUROPIUM 151
EUROPIUM OXIDES
HIGH-TC SUPERCONDUCTORS
LANTHANUM OXIDES
MOESSBAUER EFFECT
PHASE DIAGRAMS
QUADRUPOLE MOMENTS
STOICHIOMETRY
STRONTIUM OXIDES
STRUCTURAL CHEMICAL ANALYSIS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K