Ferromagnetism in the Mott insulator Ba2NaOsO6

A. S. Erickson; S. Misra; G. J. Miller; R. R. Gupta; Z. Schlesinger; W. A. Harrison; J. M. Kim; I. R. Fisher

doi:10.1103/PhysRevLett.99.016404

Ferromagnetism in the Mott insulator Ba2NaOsO6

Strongly Correlated Electrons 2009-11-11 v2 Materials Science

Authors: A. S. Erickson , S. Misra , G. J. Miller , R. R. Gupta , Z. Schlesinger , W. A. Harrison , J. M. Kim , I. R. Fisher

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Results are presented of single crystal structural, thermodynamic, and reflectivity measurements of the double-perovskite Ba2NaOsO6. These characterize the material as a 5d^1 ferromagnetic Mott insulator with an ordered moment of ~0.2 Bohr magnetons 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 groundstate anticipated from consideration of the crystal structure is split, consistent with a scenario in which the ferromagnetism is associated with orbital ordering.

Keywords

ferromagnetism Mott insulator double perovskite Ba2NaOsO6 orbital ordering magnetic entropy

Cite

@article{arxiv.cond-mat/0610385,
  title  = {Ferromagnetism in the Mott insulator Ba2NaOsO6},
  author = {A. S. Erickson and S. Misra and G. J. Miller and R. R. Gupta and Z. Schlesinger and W. A. Harrison and J. M. Kim and I. R. Fisher},
  journal= {arXiv preprint arXiv:cond-mat/0610385},
  year   = {2009}
}

Comments

5 pages, 5 figures, added references

Ferromagnetism in the Mott insulator Ba2NaOsO6

Abstract

Keywords

Cite

Comments

Related papers