Effects of rare-earth co-doping on the local structure of rare-earth phosphate glasses using high and low energy X-ray diffraction

Cramer, A.J. and Cole, J.M. and FitzGerald, V. and Honkimaki, V. and Roberts, M.A. and Brennan, T. and Martin, R.A. and Saunders, G.A. and Newport, Robert J. (2013) Effects of rare-earth co-doping on the local structure of rare-earth phosphate glasses using high and low energy X-ray diffraction. Physical Chemistry Chemical Physics, 15 (22). pp. 8529-8543. ISSN 1463-9076. (doi:https://doi.org/10.1039/c3cp44298e) (Full text available)

PDF - Publisher pdf
Download (1MB) Preview
[img]
Preview
Official URL
http://dx.doi.org/10.1039/c3cp44298e

Abstract

Rare-earth co-doping in inorganic materials has a long-held tradition of facilitating highly desirable optoelectronic properties for their application to the laser industry. This study concentrates specifically on rare-earth phosphate glasses, (R2O3)x(R′2O3)y(P2O5)1−(x+y), where (R, R′) denotes (Ce, Er) or (La, Nd) co-doping and the total rare-earth composition corresponds to a range between metaphosphate, RP3O9, and ultraphosphate, RP5O14. Thereupon, the effects of rare-earth co-doping on the local structure are assessed at the atomic level. Pair-distribution function analysis of high-energy X-ray diffraction data (Qmax = 28 Å−1) is employed to make this assessment. Results reveal a stark structural invariance to rare-earth co-doping which bears testament to the open-framework and rigid nature of these glasses. A range of desirable attributes of these glasses unfold from this finding; in particular, a structural simplicity that will enable facile molecular engineering of rare-earth phosphate glasses with ‘dial-up’ lasing properties. When considered together with other factors, this finding also demonstrates additional prospects for these co-doped rare-earth phosphate glasses in nuclear waste storage applications. This study also reveals, for the first time, the ability to distinguish between P–O and P[double bond, length as m-dash]O bonding in these rare-earth phosphate glasses from X-ray diffraction data in a fully quantitative manner. Complementary analysis of high-energy X-ray diffraction data on single rare-earth phosphate glasses of similar rare-earth composition to the co-doped materials is also presented in this context. In a technical sense, all high-energy X-ray diffraction data on these glasses are compared with analogous low-energy diffraction data; their salient differences reveal distinct advantages of high-energy X-ray diffraction data for the study of amorphous materials.

Item Type: Article
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Phys. Chem. Chem. Phys. [Field not mapped to EPrints] AD - Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom [Field not mapped to EPrints] AD - Department of Physics, University of New Brunswick, P.O. Box 4400, Fredericton E3B 5A3, Canada [Field not mapped to EPrints] AD - Department of Chemistry, University of New Brunswick, P.O. Box 4400, Fredericton E3B 5A3, Canada [Field not mapped to EPrints] AD - School of Physical Sciences, University of Kent, Canterbury Kent CT2 7NR, United Kingdom [Field not mapped to EPrints] AD - European Synchrotron Radiation Facility, B. P. 220, Grenoble Cedex 9, France [Field not mapped to EPrints] AD - Synchrotron Radiation Source, Daresbury Laboratory, Warrington, Cheshire WA4 4AD, United Kingdom [Field not mapped to EPrints] AD - Department of Physics, University of Bath, Claverton Down, Bath BA2 7AY, United Kingdom [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 12 Feb 2015 15:05 UTC
Last Modified: 16 Apr 2019 09:21 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46950 (The current URI for this page, for reference purposes)
Newport, Robert J.: https://orcid.org/0000-0002-2365-992X
  • Depositors only (login required):

Downloads

Downloads per month over past year