| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5402198 | Journal of Luminescence | 2011 | 4 Pages |
Abstract
Spectroscopic investigations are presented of KMgF3:Eu2+ crystal under high hydrostatic pressure from ambient to 310Â kbar. The sample was excited by 30Â ps pulses generated by optical parametric generator (OPG) system with wavelength controlled between 210 and 325Â nm. The Grüneisen parameters of individual phonons are obtained from the pressure shift of the Eu2+ emission related to the 6P7/2â8S7/2 transition accompanied by phonon sideband. The luminescence decays exponentially for the pressure below 135Â kbar with lifetime of 3.30Â ms and slightly nonexponential above 135Â kbar, while the average decay time is nearly independent of the pressure. The results obtained for KMgF3:Eu2+ are compared with those for LiBaF3:Eu2+ in which the 6P7/2â8S7/2 emission is replaced by the broadband emission of the 4f65d1â4f7 transition at high hydrostatic pressure.
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Authors
K. Winskiewski, S. Mahlik, M. Grinberg, Hyo Jin Seo,