Ames Laboratory, Chemistry
Journal or Book Title
Physical Review Letters
Results are presented of single crystal structural, thermodynamic, and reflectivity measurements of the double-perovskite Ba2NaOsO6. These characterize the material as a 5d1 ferromagnetic Mott insulator with an ordered moment of ∼0.2μB per formula unit and TC=6.8(3) K. The magnetic entropy associated with this phase transition is close to Rln2, indicating that the quartet ground state anticipated from consideration of the crystal structure is split, consistent with a scenario in which the ferromagnetism is associated with orbital ordering.
American Physical Society
Erickson, A.S.; Misra, Sumohan; Miller, Gordon J.; Gupta, R.R.; Schlesinger, Z.; Harrison, W.A.; Kim, J.M.; and Fisher, I.R., "Ferromagnetism in the Mott Insulator Ba2NaOsO6" (2007). Chemistry Publications. 739.