Crystal-field analysis 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>-doped yttrium aluminum garnet by site-selective polarized spectroscopy

The optical isotropy of cubic garnet was overcome by crystal-site-selective polarized excitation and fluorescence spectroscopy. By this method the energies and the symmetries of the crystal-field components of the free-ion states $^{7}$${\mathit{F}}_{\mathit{J}}$ (J=0,...,6), and $^{5}$${\mathit{D}}_{\mathit{J}}$ (J=0,...,3) could be determined. On this basis a crystal-field analysis was performed to derive the crystal-field parameters for the ${\mathrm{Eu}}^{3+}$ replacing the ${\mathrm{Y}}^{3+}$ ions on the ${\mathit{D}}_{2}$ sites. Most of the transitions were either of electric- or magnetic-dipole character. For a number of transitions mixed electric- and magnetic-dipole character was found, and the mixing ratios were determined.

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