Assignment of absorption lines of mixed valence Cr³⁺- Cr²⁺ pair center has been done by the analysis of the probabilities of exchange-induced electric-dipole transitions. Parameters of exchange interaction J₁ equals 44.5 +/- 5 cm^-1 and axial crystal field B⁰₂ equals -19.6 +/- 2 cm^-1 for the excited state have been estimated from the fine structure of absorption spectra of the pair. Using microscopic theory of superexchange interaction for the ground and excited states of the pair the value of the transfer integral of e_g-electron via the intermediate fluorine ion t_vv equals 3500 cm^-1 has been extracted.

Date Published: 12 July 2002
PDF: 6 pages
Proc. SPIE 4766, XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions, (12 July 2002); doi: 10.1117/12.475318

Published in SPIE Proceedings Vol. 4766:
XI Feofilov Symposium on Spectroscopy of Crystals Activated by Rare-Earth and Transition Metal Ions