TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Speghini, Adolfo
AU  - Brik, Mikhail G.
AU  - Bartova, Barbora
AU  - Bettinelli, Marco
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5944
AB  - A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions
VL  - 36
IS  - 6
SP  - 1083
EP  - 1091
DO  - 10.1016/j.optmat.2014.01.039
ER  - 

@article{
author = "Krsmanović, Radenka and Antić, Željka and Speghini, Adolfo and Brik, Mikhail G. and Bartova, Barbora and Bettinelli, Marco and Dramićanin, Miroslav",
year = "2014",
abstract = "A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions",
volume = "36",
number = "6",
pages = "1083-1091",
doi = "10.1016/j.optmat.2014.01.039"
}

Krsmanović, R., Antić, Ž., Speghini, A., Brik, M. G., Bartova, B., Bettinelli, M.,& Dramićanin, M.. (2014). Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials, 36(6), 1083-1091.
https://doi.org/10.1016/j.optmat.2014.01.039

Krsmanović R, Antić Ž, Speghini A, Brik MG, Bartova B, Bettinelli M, Dramićanin M. Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials. 2014;36(6):1083-1091.
doi:10.1016/j.optmat.2014.01.039 .

Krsmanović, Radenka, Antić, Željka, Speghini, Adolfo, Brik, Mikhail G., Bartova, Barbora, Bettinelli, Marco, Dramićanin, Miroslav, "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions" in Optical Materials, 36, no. 6 (2014):1083-1091,
https://doi.org/10.1016/j.optmat.2014.01.039 . .

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Morozov, V. A.
AU  - Lebedev, O. I.
AU  - Polizzi, S.
AU  - Speghini, A.
AU  - Bettinelli, M.
AU  - Tendeloo, Gustaaf Van
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3228
AB  - Nanocrystalline powders of undoped and lanthanide (Pr3+, Tm3+)- doped gadolinium gallium garnet, Gd3Ga5O12 (GGG), were prepared by propellant synthesis and studied by x-ray powder diffraction (XRD), electron diffraction (ED), high-resolution electron microscopy (HREM) and luminescence spectroscopy. The x-ray diffraction patterns of the GGG samples were analysed using the Rietveld method. The Rietveld refinement reveals the existence of two garnet-type phases: both are cubic (space group Ia $(3) over bar $d) with a slightly different lattice parameter and probably a slightly different composition. Electron diffraction and electron microscopy measurements confirm the x-ray diffraction results. EDX measurements for lanthanide-doped samples show that stable solid solutions with composition Gd(3-x)Ln(x)Ga(5)O(12), x approximate to 0.3 ( Ln = Pr; Tm) have been obtained. The luminescence properties of the Tm3+ -doped nanocrystalline GGG samples were measured and analysed.
T2  - Nanotechnology
T1  - Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis
VL  - 18
IS  - 32
DO  - 10.1088/0957-4484/18/32/325604
ER  - 

@article{
author = "Krsmanović, Radenka and Morozov, V. A. and Lebedev, O. I. and Polizzi, S. and Speghini, A. and Bettinelli, M. and Tendeloo, Gustaaf Van",
year = "2007",
abstract = "Nanocrystalline powders of undoped and lanthanide (Pr3+, Tm3+)- doped gadolinium gallium garnet, Gd3Ga5O12 (GGG), were prepared by propellant synthesis and studied by x-ray powder diffraction (XRD), electron diffraction (ED), high-resolution electron microscopy (HREM) and luminescence spectroscopy. The x-ray diffraction patterns of the GGG samples were analysed using the Rietveld method. The Rietveld refinement reveals the existence of two garnet-type phases: both are cubic (space group Ia $(3) over bar $d) with a slightly different lattice parameter and probably a slightly different composition. Electron diffraction and electron microscopy measurements confirm the x-ray diffraction results. EDX measurements for lanthanide-doped samples show that stable solid solutions with composition Gd(3-x)Ln(x)Ga(5)O(12), x approximate to 0.3 ( Ln = Pr; Tm) have been obtained. The luminescence properties of the Tm3+ -doped nanocrystalline GGG samples were measured and analysed.",
journal = "Nanotechnology",
title = "Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis",
volume = "18",
number = "32",
doi = "10.1088/0957-4484/18/32/325604"
}

Krsmanović, R., Morozov, V. A., Lebedev, O. I., Polizzi, S., Speghini, A., Bettinelli, M.,& Tendeloo, G. V.. (2007). Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis. in Nanotechnology, 18(32).
https://doi.org/10.1088/0957-4484/18/32/325604

Krsmanović R, Morozov VA, Lebedev OI, Polizzi S, Speghini A, Bettinelli M, Tendeloo GV. Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis. in Nanotechnology. 2007;18(32).
doi:10.1088/0957-4484/18/32/325604 .

Krsmanović, Radenka, Morozov, V. A., Lebedev, O. I., Polizzi, S., Speghini, A., Bettinelli, M., Tendeloo, Gustaaf Van, "Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis" in Nanotechnology, 18, no. 32 (2007),
https://doi.org/10.1088/0957-4484/18/32/325604 . .