Abstract
We combined high field optical spectroscopy and first principles calculations to analyze the electronic structure of across the 53 K and 9 T magnetic transitions, both of which are accompanied by large changes in electric polarization. The color properties are sensitive to magnetic order due to field-induced changes in the crystal field environment, with those around Ni1 and Ni2 most affected. These findings advance the understanding of magnetoelectric coupling in materials in which magnetic centers coexist with nonmagnetic heavy chalcogenide cations.
- Received 25 November 2015
DOI:https://doi.org/10.1103/PhysRevLett.117.147402
© 2016 American Physical Society