Rawl, R.
, Ge, L.
, Agrawal, H.
, Kamiya, Y.
, Dela Cruz, C.
, Butch, N.
, Sun, X.
, Lee, M.
, Choi, E.
, Oitmaa, J.
, Batista, C.
, Mourigal, M.
, Zhou, H.
and Ma, J.
(2017),
Ba<sub>8</sub>CoNb<sub>6</sub>O<sub>24</sub>: A Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet in the Two-Dimensional Limit, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=922407
(Accessed November 4, 2025)
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Ba8CoNb6O24: A Spin-1/2 Triangular-Lattice Heisenberg Antiferromagnet in the Two-Dimensional Limit
Published
Author(s)
R. Rawl, L. Ge, H. Agrawal, Y. Kamiya, C. R. Dela Cruz, , X. F. Sun, M. Lee, E. S. Choi, J. Oitmaa, C. D. Batista, M. Mourigal, H. D. Zhou, J. Ma
Abstract
The quasi-two-dimensional perovskite Ba8CoNb6O24 comprises equilateral effective spin-1/2 Co2+ triangular layers separated by six nonmagnetic Nb5+ layers. Susceptibility, specific heat and neutron scattering measurements combined with high-temperature series expansions and spin-wave calculations confirm that Ba8CoNb6O24 is basically a two-dimensional(2D)magnet with no detectable spin anisotropy and no long range magnetic ordering down to 0.06 K. In other words, Ba8CoNb6O24 is very close to be a realization of the paradigmatic S = 1/2 triangular Heisenberg model, which is not expected to exhibit symmetry breaking at finite temperature according to Mermin and Wagner theorem.Citation
Physical Review B
Volume
95
Issue
6
Pub Type
Journals
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Keywords
magnet
Citation
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Created February 16, 2017, Updated October 12, 2021