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Singlet-Triplet Dispersion Reveals Additional Frustration in the Triangular-Lattice Dimer Compound Ba 3 Mn 2 O 8
Published
Author(s)
M. B. Stone, M. D. Lumsden, Sung Chang, E. C. Samulon, C. D. Batista, I. R. Fisher
Abstract
We present single crystal inelastic neutron scattering measurements of the S=1 dimerized quasi-two-dimensional antiferromagnet Ba3Mn2O8. The singlet-triplet dispersion reveals nearest-neighbor and next-nearest-neighbor ferromagnetic interactions between adjacent bilayers that compete against each other. Although the interbilayer exchange is comparable to the intrabilayer exchange, this additional frustration reduces the effective coupling along the c axis and leads to a quasi-two-dimensional behavior. In addition, the obtained exchange values are able to reproduce the four critical fields in the phase diagram.
Stone, M.
, Lumsden, M.
, Chang, S.
, Samulon, E.
, Batista, C.
and Fisher, I.
(2008),
Singlet-Triplet Dispersion Reveals Additional Frustration in the Triangular-Lattice Dimer Compound Ba 3 Mn 2 O 8, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.100.237201, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610056
(Accessed October 14, 2025)