dc.contributor.author |
Aminov L. |
|
dc.contributor.author |
Abdulsabirov R. |
|
dc.contributor.author |
Gafurov M. |
|
dc.contributor.author |
Korableva S. |
|
dc.contributor.author |
Kurkin I. |
|
dc.contributor.author |
Kurzin S. |
|
dc.contributor.author |
Rakhmatullin R. |
|
dc.contributor.author |
Ziganshin A. |
|
dc.date.accessioned |
2018-09-17T20:55:18Z |
|
dc.date.available |
2018-09-17T20:55:18Z |
|
dc.date.issued |
2005 |
|
dc.identifier.issn |
0937-9347 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/134262 |
|
dc.description.abstract |
Electron paramagnetic resonance (EPR) spectra of impurity Yb3+ ions (about 0.1 at.%) in mixed crystals BaF2(1 - x) plus LaF 3(x;) have been investigated for different values of the concentration x at a frequency of about 9.5 GHz by both continuous-wave (CW) EPR and electron spin echo methods. A spectrum of trigonal symmetry with a complex hyperfine structure is observed in "pure" BaF2:Yb 3+ (x = 0). Upon admixture of small amounts of LaF3 (x = 0.001), additional EPR lines arise with intensities increasing with the increase of x up to 0.005. These lines are attributed to trigonal centers including two rare-earth ions and two compensating fluorine ions. A further increase of x results in a decrease of the total EPR spectrum intensity, and at x ≥ 0.05 the CW resonance becomes practically unobservable. This may be due to the formation of rare-earth ion clusters with paramagnetic Yb3+ ions occurring in domains with a disordered structure of surroundings resulting in very broad EPR lines, which cannot be registered by CW EPR. Indeed, very broad (not less than 1 kG) EPR lines were observed by the electron spin echo method for concentrations x ≥ 0.02. © Springer-Verlag 2005. |
|
dc.relation.ispartofseries |
Applied Magnetic Resonance |
|
dc.title |
EPR of Yb3+ ions in Ba1-xLaxF 2+x mixed crystals |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
1-2 |
|
dc.relation.ispartofseries-volume |
28 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
41 |
|
dc.source.id |
SCOPUS09379347-2005-28-12-SID19044390324 |
|