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Title: Opposite correlations between cation disordering and amorphization resistance in spinels versus pyrochlores
Authors: Uberuaga, B.P.
Tang, Ming
Jiang, C.
Valdez, James A.
Smith, Roger
Wang, Yongqiang
Sickafus, K.E.
Issue Date: 2015
Publisher: © The Authors. Published by Nature Publishing Group
Citation: UBERUAGA, B.P. ...et al., 2015. Opposite correlations between cation disordering and amorphization resistance in spinels versus pyrochlores. Nature Communications, 6, 8750.
Abstract: Understanding and predicting radiation damage evolution in complex materials is crucial for developing next-generation nuclear energy sources. Here, using a combination of ion beam irradiation, transmission electron microscopy and X-ray diffraction, we show that, contrary to the behaviour observed in pyrochlores, the amorphization resistance of spinel compounds correlates directly with the energy to disorder the structure. Using a combination of atomistic simulation techniques, we ascribe this behaviour to structural defects on the cation sublattice that are present in spinel but not in pyrochlore. Specifically, because of these structural defects, there are kinetic pathways for the relaxation of disorder in spinel that are absent in pyrochlore. This leads to a direct correlation between amorphization resistance and disordering energetics in spinel, the opposite of that observed in pyrochlores. These results provide new insight into the origins of amorphization resistance in complex oxides beyond fluorite derivatives.
Description: This is an Open Access Article. It is published by Nature Publishing Group under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/4.0/
Version: Published
DOI: 10.1038/ncomms9750
URI: https://dspace.lboro.ac.uk/2134/19944
Publisher Link: http://dx.doi.org/10.1038/ncomms9750
ISSN: 2041-1723
Appears in Collections:Published Articles (Maths)

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