UNIGE document Scientific Article
previous document  unige:86440  next document
add to browser collection
Title

Rapid characterization of complex structural phase transitions using powder diffraction and an area detector

Authors
Pattison, Philip
Knudsen, Kenneth D.
Published in Journal of Synchrotron Radiation. 2000, vol. 7, no. 4, p. 251-256
Abstract The use of a high-intensity and well collimated X-ray beam from a third-generation synchrotron source, combined with an area detector with online readout capabilities, allows high-quality powder patterns to be obtained with exposure times of only a few seconds. Powder measurements of a rare-earth manganate perovskite (Nd0.43Sr0.57MnO3) were performed in the temperature range 105–200 K, and the data were of sufficient quality to be able to extract, via Rietveld refinement, accurate values for the lattice constants and atomic parameters. The temperature dependence of the Mn—O—Mn bond angles and Mn—O distances obtained in this manner illustrate the well known correlation between the distortion of the MnO6 octahedra and the onset of orbital ordering. The success of this study, for which only two hours of synchrotron beam time was required, indicates the enormous improvements in efficiency and throughput which area detectors are bringing to powder diffraction experiments.
Keywords X-ray diffractionTwo-dimensional detectionStructural phase transitions
Identifiers
Full text
Structures
Citation
(ISO format)
PATTISON, Philip et al. Rapid characterization of complex structural phase transitions using powder diffraction and an area detector. In: Journal of Synchrotron Radiation, 2000, vol. 7, n° 4, p. 251-256. https://archive-ouverte.unige.ch/unige:86440

64 hits

28 downloads

Update

Deposited on : 2016-08-29

Export document
Format :
Citation style :