Abstract
Magneto-optical effects have been investigated over the infrared visible spectral range in () spinel oxides with noncollinear spin orders in their ground states. We found large magneto-optical Kerr rotation and ellipticity at the on-site transitions of the ions located within the charge gap. The magneto-optical Kerr rotation of observed in is unprecedentedly large among magnetic semiconductors and points toward the uniqueness of tetrahedrally coordinated ions in generating strong magneto-optical response. Criteria of strong magneto-optical effects emerging at on-site transitions of transition metal ions are discussed.
- Received 30 November 2017
DOI:https://doi.org/10.1103/PhysRevB.97.125140
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