Singlet ground state in the spin-1/2 dimer compound Sr3Cr2O8

Yogesh Singh; D. C. Johnston

doi:10.1103/PhysRevB.76.012407

Singlet ground state in the spin-1/2 dimer compound Sr3Cr2O8

Strongly Correlated Electrons 2010-11-17 v2 Materials Science

Authors: Yogesh Singh , D. C. Johnston

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Magnetic susceptibility and specific heat versus temperature measurements on polycrystalline samples of Sr3Cr2O8 and the isostructural, nonmagnetic compound Sr3V2O8 are reported. A Curie-Wiess fit to the high-temperature susceptibility data for Sr3Cr2O8 indicates that the Cr atoms are in the rare Cr^5+ (Spin S = 1/2) valence state as expected from the composition. The ground state was found to be a spin singlet with an excitation gap Delta/k_ B = 61.9(1) K to the magnetic triplet states, and a weak interdimer coupling of 6(2) K was inferred. The specific heat and susceptibility measurements on Sr3V2O8 reveal a phase transition at 110 K which is evidently a structural transition.

Keywords

frustrated magnetism magnetic materials and spin systems nuclear excited states

Cite

@article{arxiv.cond-mat/0702309,
  title  = {Singlet ground state in the spin-1/2 dimer compound Sr3Cr2O8},
  author = {Yogesh Singh and D. C. Johnston},
  journal= {arXiv preprint arXiv:cond-mat/0702309},
  year   = {2010}
}

Comments

Revised version with 5 pages, 5 figures, 1 Table

Related papers

View all related →