Abstract
The magnetic circular dichroism (MCD), Faraday rotation (FR), and absorption spectra of at 77 K are presented between 10 000 and 25 000 . Comparison of MCD and FR line shapes with absorption-band energies indicates that the crystal-field transitions are predominantly paramagnetic in nature. It is shown that spin-orbit mixing of the excited crystal-field states into the ground state is sufficient to explain the observed MCD of the band without producing an unacceptable change in the ground-state factor and is consistent with the observation of paramagnetic line shapes for the other crystalfield transitions. It is pointed out that previous analyses of the magneto-optic spectra of iron garnets above 20 000 are probably in error.
- Received 17 March 1975
DOI:https://doi.org/10.1103/PhysRevB.12.2562
©1975 American Physical Society