Author, as appears in the article.: Subbotin, Kirill; Loiko, Pavel; Slimi, Sami; Volokitina, Anna; Titov, Anatoly; Lis, Denis; Chernova, Elena; Kuznetsov, Sergei; Sole, Rosa Maria; Griebner, Uwe; Petrov, Valentin; Aguilo, Magdalena; Diaz, Francesc; Camy, Patrice; Zharikov, Evgenii; Mateos, Xavier
Department: Química Física i Inorgànica
URV's Author/s: Aguiló Díaz, Magdalena / Díaz González, Francisco Manuel / Mateos Ferré, Xavier / Slimi, Sami / Solé Cartañà, Rosa Maria / Volokitina, Anna
Keywords: Znwo4 crystal scintillators Ytterbium lasers Tungstate crystals Stimulated raman scattering Spectroscopic properties Single-crystals Optical-properties Operation Laser performance Impurities Fe Czochralski method Crystal structure Coloration Charge-compensation Cdwo4
Abstract: © 2020 Elsevier B.V. We report on the growth of a co-doped divalent-metal monotungstate crystal, Yb3+,Li+:ZnWO4, its structure refinement, thermo-mechanical properties and polarized Raman spectra. Yb3+,Li+:ZnWO4 crystals are grown by the Czochralski method using Pt/Rh and Pt crucibles. The nature of crystal coloration is discussed and assigned to color centers based on oxygen vacancies as well as Fe2+(Fe3+) species and, possibly, other uncontrolled impurities of transition metal ions. Oxidizing annealing at 800 °C helps to improve the transparency of Yb3+,Li+:ZnWO4 leading to a weak residual pink coloration. Yb3+,Li+:ZnWO4 was confirmed to be monoclinic (sp. gr. P2/c – C42h, No. 13) with lattice constants a = 4.702(2) Å, b = 5.718(6) Å, c = 4.930(4) Å and β = 90.713(5)°. The coefficients of linear thermal expansion are α[100] = 11.71, α[010] = 9.90 and α[001] = 7.01 [10−6 K−1]. The melting point of the crystal is at 1166 °C and no thermal effects are found below the melting point. The Yb3+,Li+:ZnWO4 crystal shows intense and strongly polarized Raman spectra with the most intense mode at 906.0 cm−1 assigned to the W – O stretching vibrations in the [WO6] octahedra. It is thus a promising gain medium for laser emission at ~1 μm and for self-Raman frequency conversion.
Thematic Areas: Química Optics Odontología Medicina ii Medicina i Materiais Interdisciplinar General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciência de alimentos Chemistry (miscellaneous) Chemistry (all) Biotecnología Biophysics Biochemistry Atomic and molecular physics, and optics Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 00222313
Author's mail: anna.volokitina@estudiants.urv.cat sami.slimi@estudiants.urv.cat sami.slimi@estudiants.urv.cat magdalena.aguilo@urv.cat rosam.sole@urv.cat xavier.mateos@urv.cat f.diaz@urv.cat
Author identifier: 0000-0002-6091-6534 0000-0001-6130-9579 0000-0002-5769-4141 0000-0003-1940-1990 0000-0003-4581-4967
Record's date: 2024-10-19
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0022231320312369
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Luminescence. 228 (117601): 117601-
APA: Subbotin, Kirill; Loiko, Pavel; Slimi, Sami; Volokitina, Anna; Titov, Anatoly; Lis, Denis; Chernova, Elena; Kuznetsov, Sergei; Sole, Rosa Maria; Grieb (2020). Monoclinic zinc monotungstate Yb3+,Li+:ZnWO4: Part I. Czochralski growth, structure refinement and Raman spectra. Journal Of Luminescence, 228(117601), 117601-. DOI: 10.1016/j.jlumin.2020.117601
Article's DOI: 10.1016/j.jlumin.2020.117601
Entity: Universitat Rovira i Virgili
Journal publication year: 2020
Publication Type: Journal Publications
Repositori URV