| dc.contributor.author | Antuzevics, Andris | |
| dc.contributor.author | Kemere, Meldra | |
| dc.contributor.author | Krieke, Guna | |
| dc.date.accessioned | 2021-01-08T17:53:09Z | |
| dc.date.available | 2021-01-08T17:53:09Z | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 0925-8388 | |
| dc.identifier.uri | https://www.sciencedirect.com/science/article/abs/pii/S0925838818320164 | |
| dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/53330 | |
| dc.description | CC BY-NC-ND | en_US |
| dc.description.abstract | Gadolinium doped SrF2 nanoparticles have been synthesized by the precipitation method and characterized by site-selective optical spectroscopy and electron paramagnetic resonance (EPR) spectroscopy methods at cryogenic temperatures. The type of Gd3+ centres present in SrF2 is strongly dependent on the heat treatment parameters – the chosen temperature and gas composition during the annealing. Gd3+ ions in SrF2 annealed at temperatures up to 400 °C are mainly incorporated into sites with cubic symmetry. Higher annealing temperatures enable charge compensators to locate in a closer vicinity of the Gd3+ ion lowering the site symmetry. Oxygen compensated Gd3+ centres form after heating in air atmosphere, whereas for samples heated at an identical temperature in inert atmosphere interstitial fluorine ions serve as charge compensators. A comparison with previous studies of transparent glass ceramics containing SrF2:Gd3+ shows similar patterns in gadolinium centre formation with the precipitated nanoparticles annealed in inert atmosphere here. The obtained results give a fundamental insight in trivalent defect formation mechanisms in nanostructured SrF2 systems. ---/ / /---- This is the preprint version of the following article: A. Antuzevics, M. Kemere, G. Krieke, Multisite formation in gadolinium doped SrF2 nanoparticles, Journal of Alloys and Compounds 762 (2018), which has been published in final form at https://www.sciencedirect.com/science/article/abs/pii/S0925838818320164. This article may be used for non-commercial purposes in accordance with Elsevier Terms and Conditions for Sharing and Self-Archiving. CC BY-NC-ND | en_US |
| dc.description.sponsorship | Authors thank prof. Uldis Rogulis for valuable discussions and suggestions and Dr. Krisjanis Smits for TEM measurements. Financial support provided by Scientific Research Project for Students and Young Researchers Nr. SJZ/2017/2 realized at the Institute of Solid State Physics, University of Latvia is greatly acknowledged. Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
| dc.language.iso | eng | en_US |
| dc.publisher | Elsevier B.V. | en_US |
| dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
| dc.relation.ispartofseries | Journal of Alloys and Compounds;762 | |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
| dc.title | Multisite formation in gadolinium doped SrF2 nanoparticles | en_US |
| dc.type | info:eu-repo/semantics/preprint | en_US |
| dc.rights.license | his article may be used for non-commercial purposes in accordance with Elsevier Terms and Conditions for Sharing and Self-Archiving. CC BY-NC-ND | |
| dc.identifier.doi | 10.1016/j.jallcom.2018.05.283 | |
