Neutron-diffraction pattern observed in YBa2Cu3O6.35: No better explanation than oxygen ordering
Creators
- 1. International Centre for Theoretical Physics, Trieste (Italy)
- 2. Comision Nacional de Energia Atomica, San Carlos de Bariloche (Argentina). Centro Atomico Bariloche
Description
We have looked for the best possible fit of the neutron-diffraction data of YBa2Cu3O6.35 measured by Sonntag et al. [Phys. Rev. Lett. 66 (1990) 1497] using the deformation modulated structure for CuO2 planes proposed by T. Krekels, S. Kaesche and G. Van Tendeloo [Physica C 248 (1995) 317]. The resulting fit is bad. We discuss the reasons of this failure. The best explanation of the neutron data is given by the structure obtained by Aligia [Europhys. Lett. 18 (1992) 181] from the thermodynamics of oxygen ordering. Using a simple highly-correlated electronic model, we also show that there are no theoretical grounds to discard 2√2 x 2√2 oxygen ordered superstructures. Recent nuclear-quadrupole-resonance spectra support this conclusion. (author). 42 refs, 2 figs, 1 tab
Availability note (English)
MF available from INIS under the Report Number.Files
28011580.pdf
Files
(218.1 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:73645602ba24acf75008ef2ef5761264
|
218.1 kB | Preview Download |
Additional details
Publishing Information
- Imprint Pagination
- 19 p.
- Report number
- IC/IR--96/21
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 28011580
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BARIUM OXIDES; COPPER OXIDES; CRYSTAL MODELS; ELECTRON CORRELATION; EXPERIMENTAL DATA; HIGH-TC SUPERCONDUCTORS; NEUTRON DIFFRACTION; ORDER PARAMETERS; OXYGEN; THEORETICAL DATA; YTTRIUM OXIDES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COHERENT SCATTERING; COPPER COMPOUNDS; CORRELATIONS; DATA; DIFFRACTION; ELEMENTS; INFORMATION; MATHEMATICAL MODELS; NONMETALS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; SCATTERING; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS