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- W1498868902 abstract "The fluorescence of ${mathrm{Eu}}^{3+}$ in ${mathrm{LiNbO}}_{3}$ has been investigated using laser-excited site-selection spectroscopy. Four different crystal-field sites, denoted as Eu(1), Eu(2), Eu(3), and Eu(4) have been detected and optically characterized through their corresponding $^{5}$${mathit{D}}_{0}$${ensuremath{rightarrow}}^{7}$${mathit{F}}_{1}$ magnetic-dipole emission transitions. The local symmetry of the ${mathrm{Eu}}^{3+}$ ions in these sites deviates slightly from the ${mathit{C}}_{3}$ main symmetry as a consequence of distortions perpendicular to the c ferroelectric axis. The relative concentrations of these sites have been studied as a function of the [Li]/[Nb] concentration ratio. It is suggested that the formation of ${mathrm{Eu}}^{3+}$(${mathrm{Nb}}^{5+}$)-${mathrm{Eu}}^{3+}$(${mathrm{Li}}^{+}$) pairs is responsible for the major Eu(3) and Eu(4) sites, while the Eu(1) and Eu(2) sites correspond to ${mathrm{Eu}}^{3+}$ ions in ${mathrm{Nb}}^{5+}$ lattice positions but perturbed by different charge-compensating defects. The effect of codoping with ${mathrm{Mg}}^{2+}$ ions has also been investigated; the same ${mathrm{Eu}}^{3+}$ sites as in the singly doped system are present, although the Eu(1) site is strongly enhanced in relation to the others." @default.
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- W1498868902 title "Optical detection of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Eu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>sites in<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>LiNbO</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:…" @default.
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- W1498868902 doi "https://doi.org/10.1103/physrevb.47.88" @default.
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