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Low-moment magnetism in the double perovskites Ba2MOsO6 (M = Li, Na).
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Oct2011, Vol. 84 Issue 14, p144416-1-144416-4. 4p. - Publication Year :
- 2011
-
Abstract
- The magnetic ground states of the isostructural double perovskites Ba2NaOsO6 and Ba2LiOsO6 are investigated with muon-spin relaxation. In Ba2NaOsO6 long-range magnetic order is detected via the onset of a spontaneous muon-spin precession signal below Tc = 7.2 ± 0.2 K, while in Ba2LiOsO6 a static but spatially disordered internal field is found below 8 K. A probabilistic argument is used to show from the observed precession frequencies that the magnetic ground state in Ba2NaOsO6 is most likely to be low-moment (≈0.2μB) ferromagnetism and not canted antiferromagnetism. Ba2LiOsO6 is antiferromagnetic and we find a spin-flop transition at 5.5 T. A reduced osmium moment is common to both compounds, probably arising from a combination of spin-orbit coupling and frustration. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 84
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 70091456
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.144416