Crystal Field Parameters. A Comparative Study for Eu exp 3+ in KLu sub 3 F sub 10 and KY sub 3 F sub 10

摘要

The irreducible tensor method for a chain of finite subgroups of the three-dimensional full rotation group O sub 3 is briefly described in connection with crystalline field effects in solids. Emphasis is put on crystal field parameters adapted to a chain of groups starting from O sub 3 . The material is applied to the interpretation of emission and excitation spectra of Eu exp 3+ in KLu sub 3 F sub 10 . Crystal field parameters for KLu sub 3 F sub 10 :Eu exp 3+ are obtained with and without J-mixing within the ground term exp 7 F of Eu exp 3+ . The results are parallel with the corresponding ones for KY sub 3 F sub 10 :Eu exp 3+ . (Atomindex citation 09:402742)