Krsmanovic, R and Morozov, V A and Lebedev, O I and Polizzi, S and Speghini, A and Bettinelli, M and Tendeloo, G Van (2007) Structural and luminescence investigation on gadolinium gallium garnet nanocrystalline powders prepared by solution combustion synthesis. Nanotechnology, 18 (32). 325604 (9pp).
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Official URL: http://stacks.iop.org/0957-4484/18/325604
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<br />bar 3d ) 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 Gd3[?]xLnxGa5O12, x[?]0.3 (Ln = Pr; Tm) have been obtained. The luminescence properties of the Tm3+-doped nanocrystalline GGG samples were measured and analysed.
|Deposited By:||Prof. Alexey Ivanov|
|Deposited On:||16 Mar 2009 10:42|
|Last Modified:||20 Mar 2009 08:58|
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