Growth conditions, structure, Raman characterization and optical properties of Sm-doped (Lu{sub x}Gd{sub 1-x}){sub 2}SiO{sub 5} single crystals grown by the Czochralski method

Journal Article · Wed Feb 15 00:00:00 EST 2012 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.12.021· OSTI ID:21612922

GLowacki, MichaL ^[1]; Dominiak-Dzik, Grazyna; Ryba-Romanowski, Witold; Lisiecki, RadosLaw; Strzep, Adam ^[2]; Runka, Tomasz; Drozdowski, MirosLaw ^[3]; Domukhovski, Viktor ^[1]; Diduszko, Ryszard ^[1]; Berkowski, Marek ^[1]

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1. Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw (Poland)
2. Institute of Low Temperature and Structure Research, Polish Academy of Sciences, ul. Okolna 2, 50-950 WrocLaw (Poland)
3. Faculty of Technical Physics, Poznan University of Technology, ul. Nieszawska 13A, 60-965 Poznan (Poland)

The (Lu{sub x}Gd{sub 0.995-x}Sm{sub 0.005}){sub 2}SiO{sub 5} single crystals with x=0.095, 0.11, 0.15, 0.17, 0.19 0.35 and 0.5 were grown by the Czochralski method. Structural properties were investigated by X-ray diffraction measurements. Unit cell parameters and cell volume were determined by the Rietveld refinement of the collected X-ray powder spectra. The segregation features between Gd and Lu were estimated and analyzed. Vibrational properties of the solid solutions were analyzed on the basis of polarized Raman spectra acquired at 300-875 K temperature range. Absorption and emission spectra of Sm{sup 3+} ion in the crystals with different composition were analyzed in the terms of dopant energy levels, oscillator strengths of transitions and spectral features of luminescence bands in the visible range. Both structural and optical investigations revealed that change of Lu{sup 3+} content in (Lu{sub x}Gd{sub 0.995-x}Sm{sub 0.005}){sub 2}SiO{sub 5} solid solution crystals induces the phase transition from C2/c (Lu{sub 2}SiO{sub 5}) to P2{sub 1}/c (Gd{sub 2}SiO{sub 5}) structure. It was found that the break of LSO to GSO-type structure occurs at 0.15<x<0.17. - Graphical abstract: Single crystals of Sm{sup 3+}-doped (Lu{sub x}Gd{sub 1-x}){sub 2}SiO{sub 5} solid solutions have been grown by Czochralski method and characterized by various techniques. Crystal structure changes from C2/c to P2{sub 1}/c for composition with 0.15<x<0.17. Change of crystal structure causes changes in emission spectra. Highlights: Black-Right-Pointing-Pointer The (Lu{sub x}Gd{sub 1-x}){sub 2}SiO{sub 5} crystals are an alternative to LSO and GSO hosts for applications. Black-Right-Pointing-Pointer The break of the P2{sub 1}/c to C2/c structure in (Lu{sub x}Gd{sub 1-x}){sub 2}SiO{sub 5}:Sm occurs for 0.15<x<0.17. Black-Right-Pointing-Pointer Temperature-induced phase transition from C2/c to P2{sub 1}/c up to 875 K was not observed. Black-Right-Pointing-Pointer Observed significant changes of emission spectra caused by P2{sub 1}/c to C2/c structural transition.

• OSTI ID: 21612922
• Journal Information: Journal of Solid State Chemistry, Vol. 186; Other Information: DOI: 10.1016/j.jssc.2011.12.021; PII: S0022-4596(11)00691-8; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ABSORPTION
CZOCHRALSKI METHOD
DOPED MATERIALS
EMISSION SPECTRA
ENERGY LEVELS
LUMINESCENCE
MONOCLINIC LATTICES
MONOCRYSTALS
OPTICAL PROPERTIES
OSCILLATOR STRENGTHS
PHASE TRANSFORMATIONS
POWDERS
RAMAN SPECTRA
RARE EARTHS
SILICATES
SOLID SOLUTIONS
X RADIATION
X-RAY DIFFRACTION
COHERENT SCATTERING
CRYSTAL GROWTH METHODS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFRACTION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
HOMOGENEOUS MIXTURES
IONIZING RADIATIONS
MATERIALS
METALS
MIXTURES
OXYGEN COMPOUNDS
PHOTON EMISSION
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
SILICON COMPOUNDS
SOLUTIONS
SORPTION
SPECTRA