A luminescence spectroscopy and theoretical study of 4f-5d transitions of Ce3+ ions in SrAlF5 crystals / Omelkov S. I.,Brik M. G.,Kirm M.,Pustovarov V. A.,Kiisk V.,Sildos I.,Lange S.,Lobanov S. I.,Isaenko L. I. // JOURNAL OF PHYSICS-CONDENSED MATTER. - 2011. - V. 23, l. 10.

ISSN/EISSN:

0953-8984 / нет данных

Type:

Article

Abstract:

This research is focused on the 4f-5d transitions in Ce3+ centers doped into tetragonal beta-SrAlF5 single crystals belonging to the I 4(1)/a space group. The presence of four non-equivalent Sr2+ sites in this compound leads to the appearance of three spectroscopically non-equivalent Ce3+ luminescence centers, which can be well distinguished using a time-resolved laser spectroscopy technique. All 4f-5d transitions have slightly varying excitation and emission energies with characteristic probabilities resulting in several decay times that can be determined experimentally. One of these centers experiences strong perturbation due to a defect nearby, probably the O2- impurity ion substituting for the F-ion and acting as a charge compensator as well. Identification of these photoluminescence centers is performed using crystal field calculations. The crystal field parameters are calculated for two identified centers using the structural data for SrAlF5; diagonalization of the crystal field Hamiltonian results in obtaining the splitting of the Ce3+ 5d states. This method allows `regular' unperturbed Ce3+ centers with selected Sr2+ sites to be assigned.

Author keywords:

LIYF4-RE3+ CRYSTALS; FLUORIDE; FIELD; SPECTRA

DOI:

10.1088/0953-8984/23/10/105501

Web of Science ID:

ISI:000287968700012

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	MAR 16
Publisher	IOP PUBLISHING LTD
Address	TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Language	English
Article-Number	105501
Keywords-Plus	LIYF4-RE3+ CRYSTALS; FLUORIDE; FIELD; SPECTRA
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	omelkovs@mail.ru
ResearcherID-Numbers	Isaenko, Ludmila/A-5272-2014 Brik, Mikhail/C-4971-2009 Lobanov, Sergey/A-5379-2014 Kirm, Marco/M-1533-2016 Isaenko, Ludmila/H-7620-2013
ORCID-Numbers	Brik, Mikhail/0000-0003-2841-2763 Kirm, Marco/0000-0002-1833-6894 Kiisk, Valter/0000-0002-9078-9038
Funding-Acknowledgement	RFBR {[}07-02-00442]; Estonian Science Foundation {[}8306]; European Commission {[}FP7/2007-2013, 226716]; Archimedes Foundation (Estonia)
Funding-Text	This work was supported by RFBR (grant 07-02-00442), the Estonian Science Foundation (grant 8306) and the SR studies by the European Commission (FP7/2007-2013, grant 226716). S I Omelkov gratefully acknowledges the Archimedes Foundation (Estonia, DoRa 5 program) for a stipend supporting his PhD studies in Tartu.
Number-of-Cited-References	29
Usage-Count-Last-180-days	2
Usage-Count-Since-2013	20
Journal-ISO	J. Phys.-Condes. Matter
Doc-Delivery-Number	729RP