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 |
|