Optical and EPR spectroscopy of manganese doped LiNaGe<sub>4</sub>O<sub>9</sub> single crystals
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F24%3APU152389" target="_blank" >RIV/00216305:26620/24:PU152389 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925346724009765?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925346724009765?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.optmat.2024.115793" target="_blank" >10.1016/j.optmat.2024.115793</a>
Alternative languages
Result language
angličtina
Original language name
Optical and EPR spectroscopy of manganese doped LiNaGe<sub>4</sub>O<sub>9</sub> single crystals
Original language description
The paper presents data on the study of optical absorption, photoluminescence and EPR of lithium-sodium tetragermanate crystals (LiNaGe4O9) doped with Mn ions. Optical spectra were measured in the range 11000-45000 cm(-1) and temperatures 77-300 K. They are attributed to manganese in the +4 charge state. From the analysis of optical spectra, the crystal field strength Dq = 2175.2 cm-1 and Racah parameters A = 4065 cm(-1), B = 813 cm(-1), C = 3239 cm(-1) were determined for the Mn4+ ions. The value of the Huang-Rhys factor SFHR = 17.56 indicates a strong electron-phonon interaction of the Mn4+ ion. The presence of Mn4+ ions was further confirmed by measurement of EPR spectra at microwave frequencies 8.9 and 320 GHz. EPR data show that Mn4+ ions occupy two structurally nonequivalent lattice sites with the formation of two Mn4+ centers: Mn1 and Mn2. From the angular dependences of the EPR spectra, the components of the g factor and the hyperfine interaction tensor A, the parameters of the axial D and rhombic E crystal field were determined for both centers. The axial constant D is large for both centers: 0.644 and 0.560 cm(-1), respectively. Analysis of optical and EPR spectroscopic data testifies that Mn4+ ions replace the Ge4+ ions in oxygen octahedrons within the host. Structurally nonequivalent centers are attributed to manganese ions located in undistorted lattice sites (Mn1) and in sites perturbed by the Li-Na antisite defect (Mn2).
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
<a href="/en/project/GA23-05578S" target="_blank" >GA23-05578S: Electric-field control of spin-qubits in quantum paraelectrics</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
OPTICAL MATERIALS
ISSN
0925-3467
e-ISSN
1873-1252
Volume of the periodical
154
Issue of the periodical within the volume
115793
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
9
Pages from-to
„“-„“
UT code for WoS article
001272718200001
EID of the result in the Scopus database
2-s2.0-85198025086