Abstract
The magnetic susceptibility, crystal and magnetic structures, and electronic structure of the double perovskite are reported. Using both neutron and x-ray powder diffraction we find that the crystal structure is monoclinic from 3.5 to 300 K. Magnetization measurements indicate an antiferromagnetic transition at , one of the highest transition temperatures of any double perovskite hosting only one magnetic ion. Type I antiferromagnetic order is determined by neutron powder diffraction, with an Os moment of only , close to half the spin-only value for a crystal field split electron state with a ground state. Density functional calculations show that this reduction is largely the result of strong Os-O hybridization, with spin-orbit coupling responsible for only a reduction in the moment.
- Received 4 March 2015
DOI:https://doi.org/10.1103/PhysRevB.91.100406
©2015 American Physical Society