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dc.contributor.author | Irisova I. | |
dc.contributor.author | Rodionov A. | |
dc.contributor.author | Tayurskii D. | |
dc.contributor.author | Yusupov R. | |
dc.date.accessioned | 2018-09-18T20:24:35Z | |
dc.date.available | 2018-09-18T20:24:35Z | |
dc.date.issued | 2011 | |
dc.identifier.issn | 1742-6588 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/139587 | |
dc.description.abstract | In the present work we show with EPR spectroscopy that the simultaneous grinding of the crystalline CaF 2 and ErF 3 salts leads to the mechanochemical doping of the single Er 3+ ions in the CaF 2 host. Dependence of the EPR spectra intensity on the grain size indicates clearly that the Er 3+ centers are created at the surface of the particles. Dominant part of the observed paramagnetic centers represent the Er 3+ ions substituting the regular quasicubic Ca 2+ lattice site (g = 6.7) perturbed by the vicinity of the surface. Fine particles of CaF 2 reveal also the nearly-isotropic EPR signal at g ∼ 1.97 that originates from the surface defects and can be used for characterization of the obtained samples with respect of the average grain size. Grinding of the of the CaF 2 and ErF 3 mixture in the ratio of 100:1 during 12 hours gives the surface density of the Er 3+ ions of ∼ 0.1 nm -2, or ∼ 10 4 Er 3- ions per the 190-nm size particle. | |
dc.relation.ispartofseries | Journal of Physics: Conference Series | |
dc.title | EPR studies of the mechanochemically Er 3+-activated fluorite nanoparticles | |
dc.type | Conference Paper | |
dc.relation.ispartofseries-issue | 1 | |
dc.relation.ispartofseries-volume | 324 | |
dc.collection | Публикации сотрудников КФУ | |
dc.source.id | SCOPUS17426588-2011-324-1-SID84859531036 |