XRD diffraction patterns of (a) pure lithium tantalate and doped lithium tantalate powders with different amounts of europium. (b) A close view showing a peak of secondary phase.
Emission spectra of samples. The excitation was fixed at the charge transfer band. The band deconvolution is presented as doted lines and the band assignment is made in the spectrum.
Occupation fraction of sites in LiTaO3 as a function of the amount in mol %. The set of bands centered at was assigned to a vacant site and the occupation fraction is the sum of for sites A and B.
Variation in the unit cell parameter for the vacant sites A and B as a function of the amount along with the variation in the occupation fraction of each site. The variation in the unit cell parameter is presented in the left side of the axis, while the occupation fraction is presented in the right side.
Variation in the unit cell parameter and occupation of the vacant site as a function of the amount. The variation in the unit cell parameter is presented in the left side of the axis, while the occupation fraction is presented in the right side.
Baricenter (nm), FWHM of the 0-0 bands, and occupation fraction of in each sites. For the site, is presented as the occupation fraction of sites A, B, and , respectively.
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