Orbitally correlated crystal field parametrization for lanthanide ions

摘要

Analogous to the treatment of the spinhyphen;correlated crystal field, a new type of lanthanide correlation crystal field, which depends on the relative orientations of the individual 4felectron orbital angular momenta and the total orbital angular momentum, is postulated. Associated sets of parameters have been obtained for TmCl3sdot;6H2O, Er3+:LaCl3, and Pr3+:LaCl3from the quadratic moments of theJhyphen;multiplet energy levels. The results show that this field is noticeable in the Pr3+:LaCl3spectrum in which the particularly well known deviance of the1D2multiplet found in conventional crystal field fitting is largely eliminated.