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Interstitial Li + Controls the UV Transmission and the Radiation Hardness in YAG
Author(s) -
Derdzyan Marina V.,
Hovhannesyan Karine L.,
Novikov Artur,
Auffray Etiennette,
Petrosyan Ashot G.,
Dujardin Christophe
Publication year - 2019
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201800724
Subject(s) - materials science , doping , irradiation , absorption (acoustics) , radiation , impurity , attenuation coefficient , analytical chemistry (journal) , ion , absorption spectroscopy , optics , optoelectronics , chemistry , composite material , physics , organic chemistry , chromatography , nuclear physics
Optical absorption spectra measured in as‐grown and gamma‐ray irradiated un‐doped YAG, Li‐doped YAG, and Ca‐doped YAG single crystals are compared for characterization of effects introduced by impurities. The studies are conducted on single crystals grown by the vertical Bridgman method. Basing on the Li + incorporation mechanism, clarification is done regarding the optimal amounts of Li + for preparation of YAG:Li crystals with low concentration of anion vacancies and related defects giving rise to absorption in the UV range. Differences in behavior are recorded in variously doped crystals subjected to gamma‐ray irradiation; in comparison to un‐doped YAG, the induced absorption coefficient in Li‐doped YAG of optimal composition is lower more than six times. High transmission in the UV and high radiation tolerance are important for most applications of YAG, especially when operated in high radiation fields.