dc.contributor.author |
Vergnoux D. |
|
dc.contributor.author |
Zinsou P. |
|
dc.contributor.author |
Zaripov M. |
|
dc.contributor.author |
Ablart G. |
|
dc.contributor.author |
Pescia J. |
|
dc.contributor.author |
Misra S. |
|
dc.contributor.author |
Rakhmatullin R. |
|
dc.contributor.author |
Orlinskii S. |
|
dc.date.accessioned |
2018-09-17T20:53:59Z |
|
dc.date.available |
2018-09-17T20:53:59Z |
|
dc.date.issued |
1996 |
|
dc.identifier.issn |
0937-9347 |
|
dc.identifier.uri |
https://dspace.kpfu.ru/xmlui/handle/net/134225 |
|
dc.description.abstract |
The electron spin-lattice relaxation rate (T1 -1) was measured in two glass samples: (i) a phosphate glass doped with 1 wt% Yb2O3 and (ii) a Li2Si4O9 glass sample doped with 0.2 wt% Gd2O3. In the Yb3+-doped glass sample, T1, was measured by an electron-spin-echo technique from 4.2 to 6 K, by the modulation method from 10 to 26 K and by the EPR linewidth from 30 to 100 K. It was found that (T1 -1) ∝ Tn with n = 9 in the range 4.2-6 K. n decreased gradually as the temperature was increased and tended towards 2 above 40 K. Over the entire temperature range 4.2-100 K, (T1 -1) was fitted to AT + BT9J8 (ΘD/T) (where A and B are two temperature-independent constants, J8 is the well-known Van Vleck integral and ΘD is the Debye temperature). The value of ΘD (= 46.3±0.9 K) so determined is in good agreement with that of Stevens and Stapleton from their T1, measurements in the range 1.5 to 7 K. In the Gd3+-doped glass, it was observed that (T1 -1) ∝ T over the range 50-150 K. The data for Ye3+-doped glass sample were accounted for by assuming that the phonon modulation of the ligand field is the dominant mechanism, associated with a low Debye temperature in accordance with the published data obtained by using other techniques to study lattice dynamics. On the other hand, the data on the Gd3+-doped glass sample were explained to be predominantly due to a mechanism involving Two-Level-Systems (TLS). © Springer-Verlag 1996 Printed in Austria. |
|
dc.relation.ispartofseries |
Applied Magnetic Resonance |
|
dc.title |
Electron spin-lattice relaxation of Yb3+ and Gd3+ ions in glasses |
|
dc.type |
Article |
|
dc.relation.ispartofseries-issue |
3-4 |
|
dc.relation.ispartofseries-volume |
11 |
|
dc.collection |
Публикации сотрудников КФУ |
|
dc.relation.startpage |
493 |
|
dc.source.id |
SCOPUS09379347-1996-11-34-SID0030367369 |
|