The substitution of aluminum with scandium in the mixed yttrium aluminum scandium garnets, Y 3 Sc x Al 5--x O 12 (x ¼ 0, 0.05, 0.5, 1.5), was studied for the first time using 27 Al magic angle spinning (MAS), multiple quantum (MQ) MAS NMR, and 45 Sc MAS NMR. The aluminum and scandium quadrupole coupling constants and isotropic chemical shifts were evaluated for all garnets under study. 27 Al 2D spectra evidenced variation of the isotropic shifts over the aluminum sites in the mixed garnets.

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We report on the first achievement of CW oscillation in Yb3+:Lu2O3 ceramic lasers (2F5/2 → 2F7/2 channel) under LD‐pumping at 0.976 µm wavelength, as well as present of the thickness of grain boundary layers in Lu2O3 ceramics was estimated under non‐equilibrium acoustic phonon propagation kinetics at helium temperature (2.4–3.8 K). (© 2006 by Astro, Ltd. Published exclusively by WILEY‐VCH Verlag GmbH & Co. KGaA)

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