Ferromagnetism in the Mott insulator Ba2NaOsO6

Journal Article · Fri Jan 15 00:00:00 EST 2010 · Submitted to Physical Review Letters

OSTI ID:970449

Erickson, A S; Misra, S; Miller, G J; Harrison, W A; Kim, J M; Fisher, I R

Results are presented of single crystal structural, thermodynamic, and reflectivity measurements of the double-perovskite Ba{sub 2}NaOsO{sub 6}. These characterize the material as a 5d1 ferromagnetic Mott insulator with an ordered moment of {approx} 0.2 {micro}B per formula unit and T{sub C} = 6.8(3) K. The magnetic entropy associated with this phase transition is close to Rln2, indicating that the quartet groundstate anticipated from consideration of the crystal structure is split, consistent with a scenario in which the ferromagnetism is associated with orbital ordering.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 970449
• Report Number(s): SLAC-PUB-13901; TRN: US201002%%1151
• Journal Information: Submitted to Physical Review Letters, Journal Name: Submitted to Physical Review Letters
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
ENTROPY
FERROMAGNETISM
MONOCRYSTALS
REFLECTIVITY
Other
MATSCI