Abstract
Uniform hexagonal microcrystals of LaAlO3 : 0. 05Eu(3+) of trigonal system were synthesized by a simple hydrothermal method and the effects of temperature and the concentration of NaOH solution were investigated. The obtained samples were characterized by scanning electron microscopy (SEM), energy dispersive Xray spectrometry (EDX), X-ray diffraction(XRD) and photoluminescence (PL) spectra. The diffraction data of LaAlo(3) : 0. 05Eu(3+) samples were refined by the Rietveld method using GSAS program on the basis of the strutural model of LaAlO3. The agreement factors are R-p = 79% and R-wp = 8. 96%. Its lattice parameters are a = b = 0. 53636(2) am and c = 1. 3101 (1) nm. SEM image exhibits the uniform hexagonal shapes of the as-synthesized LaAlO (:) 0. 05Eu(3+) microcrystals with an average diameter of about 4 mu m. The PL spectrum shows that the characterization emission of LaAlO3 :0. 05Eu(3+) is attributed to the D-5(0)-> F-7(1) magnetic dipole transition of Eu3+.
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