Abstract

Using the experimental energy levels of Gd<sup>3+</sup> in six hexagonal crystals as a basis, we discuss modifications to the electrostatic-approximation crystal-field model caused by nonlinear shielding, nephelauxetic, and covalency-induced molecular orbital effects. The crystal-field fit improves when levels belonging to different irreducible representations (crystal quantum numbers) are fitted separately and when levels of different spectroscopic terms are fitted separately. Nephelauxetic and covalency effects are related for the same crystal structure and are strongly structure dependent. Nonlinear shielding and/or term-dependent configuration-interaction effects are shown to be important but not simply related to the host structure.

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription