Please use this identifier to cite or link to this item:
https://apo.ansto.gov.au/dspace/handle/10238/1471
Title: | Diffuse scattering and lattice dynamics of superionic copper chalcogenides |
Authors: | Danilkin, SA |
Keywords: | Crystal structure Diffuse scattering Chalcogenides Neutron diffraction Diffusion Lattice parameters |
Issue Date: | 14-May-2009 |
Publisher: | Elsevier |
Citation: | Danilkin, S. A. (2009). Diffuse scattering and lattice dynamics of superionic copper chalcogenides. Solid State Ionics, 180(6-8), 483-487. doi:10.1016/j.ssi.2008.06.012 |
Abstract: | The energy-resolved neutron diffraction and inelastic neutron scattering study of diffuse scattering in copper chalcogenides was performed in order to clarify the role of static disorder versus low-energy phonons. Neutron diffraction patterns taken from Cu1.75Se, Cu1.98Se and Ag0.25Cu1.75Se powders in superionic phase show a broad maximum related to diffuse scattering. This diffuse background is suppressed in the energy-resolved experiment which indicates a strong contribution from inelastic scattering coming from correlated thermal displacements of the ions in the superionic phase. Diffraction experiments on a single crystal of α-Cu1.8Se have revealed an ordered structure with superstructure reflections at the G +/- 1/2 < 111 > and G +/- 1/3 < 220 > positions of reciprocal space at room temperature. In addition to superstructure spots, diffuse scattering was observed along the < 111 > direction which is considered as a possible diffusion path of mobile Cu ions. In inelastic neutron scattering measurements with this single crystal sample strong inelastic scattering was observed along < 111 >. This shows that the diffuse scattering found in conventional diffraction experiment is mainly inelastic and most probably comes from low-energy phonons. © 2009, Elsevier Ltd. |
Gov't Doc #: | 1492 |
URI: | http://dx.doi.org/10.1016/j.ssi.2008.06.012 http://apo.ansto.gov.au/dspace/handle/10238/1471 |
ISSN: | 0167-2738 |
Appears in Collections: | Journal Articles |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.