Spatial periodicities of defect environments in 57Fe3Al studied by Mössbauer powder diffractometry
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Jiao Y. Y. Lin
Abstract
Mössbauer powder diffractometry was used to study partially-ordered 57Fe3Al. Multiple diffraction patterns were measured at Doppler velocities across all nuclear resonances in the sample. The superlattice diffractions were analyzed to provide data on the long-range order of Fe atoms having different numbers of Al neighbors. Comparing experimental data to calculations showed that Fe atoms having three Al atoms as first-nearest neighbors (1nn) have simple cubic long-range order, similar to that of Fe atoms with four Al 1nn. The simple cubic periodicity of Fe atoms with three Al 1nn was significantly lower than expected for homogeneous antisite disorder, however. Monte-Carlo simulations and transmission electron microscopy suggest that a significant fraction of aperiodic Fe atoms with three Al 1nn are near antiphase domain boundaries.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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- Editorial: Structure of Complex Materials – Warren Award 2003
- The atomic pair distribution function: past and present
- Local crystallography of crystals with disorder
- Obtaining structural information from the atomic pair distribution function
- PDF analysis – from atomic displacements to nanocrystals
- Synchrotron studies of lattice distortions and lattice modulations in complex oxides
- Complexity of the phase transition in La1–xSrxCoO3
- Structural aspects of the M1 and M2 phases in MoVNbTeO propane ammoxidation catalysts
- High pressure study of a Zr-based bulk metallic glass and its composite
- Spatial periodicities of defect environments in 57Fe3Al studied by Mössbauer powder diffractometry
- Nanoporous thin films and porous inorganic substrates for lipid bilayer support materials
Artikel in diesem Heft
- Editorial: Structure of Complex Materials – Warren Award 2003
- The atomic pair distribution function: past and present
- Local crystallography of crystals with disorder
- Obtaining structural information from the atomic pair distribution function
- PDF analysis – from atomic displacements to nanocrystals
- Synchrotron studies of lattice distortions and lattice modulations in complex oxides
- Complexity of the phase transition in La1–xSrxCoO3
- Structural aspects of the M1 and M2 phases in MoVNbTeO propane ammoxidation catalysts
- High pressure study of a Zr-based bulk metallic glass and its composite
- Spatial periodicities of defect environments in 57Fe3Al studied by Mössbauer powder diffractometry
- Nanoporous thin films and porous inorganic substrates for lipid bilayer support materials
