Abstract
AbstractIntrinsic luminescence of the undoped (LaLu)3Lu2Ga3O12 garnet (LLGG) single crystals with high concentration of LuLa antisite defects (AD) has been studied for the first time under excitation by 1.5 ns pulse X‐ray radiation. It has been found that the host luminescence of LLGG crystal consists of two emission bands in the UV range. The band peaked at 3.80 eV at 77 K has been related to the luminescence of localized excitons (LE) perturbed by the presence of AD whereas the band peaked at 3.37 eV has been related to the radiative annihilation of bound‐state excitons localized directly at LuLa AD. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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