CHEM01200604004 Shri Sanyasinaidu Boddu - Homi Bhabha ...

GaOOH samples doped with different amounts of lanthanide ions were heated at
500 o C and their XRD patterns are shown in the Fig.33. Samples prepared with less than 1 at
% Eu are crystalline in nature with α- Ga 2 O 3 structure whereas above 1 at % Eu 3+ doping
leads to the formation of amorphous samples. In order to check the structural changes with
Eu 3+ incorporation, FT-IR measurements were carried out on undoped and 0.5, 0.75, 1, 2, 3
and 5 at% Eu 3+ doped GaOOH samples which were subjected to heat treatment at 500°C
(Fig.34).
Intensity (arb.units)
2 at % Eu
1 at % Eu
0.75 at % Eu
0.5 at % Eu
0 at % Eu
20 30 40 50 60 70
Fig.33 XRD patterns of GaOOH samples containing 0, 0.5, 0.75, 1 and 2 at % of Eu 3+ ions
after heat treatment at 500°C.
% of Transmittence
80
60
40
20
undoped
0.5 Eu
0.75 Eu
1 Eu
2 Eu
3 Eu
5 Eu
0
300 400 500 600 700 800 900
Wavenumber (cm -1 )
Fig.34. FT-IR spectra of GaOOH samples containing 0, 0.5, 0.75, 1, 2, 3 and 5 at % of Eu 3+
ions after heat treatment at 500°C.
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