Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2011-02-02
J. Phys.: Condens. Matter 23, 164219 (2011)
Physics
Condensed Matter
Statistical Mechanics
11 pages, 2 figures. Accepted for publication in J. Phys.:Condensed Matter, in a special issue dedicated on frustrated magneti
Scientific paper
10.1088/0953-8984/23/16/164219
The rare earth pyrochlore magnet Yb2Ti2O7 is among a handful of materials that apparently exhibit no long range order down to the lowest explored temperatures and well below the Curie-Weiss temperature. Paramagnetic neutron scattering on a single crystal sample has revealed the presence of anisotropic correlations and recent work has led to the proposal of a detailed microscopic Hamiltonian for this material involving significantly anisotropic exchange. In this article, we compute the local sublattice susceptibility of Yb2Ti2O7 from the proposed model and compare with the measurements of Cao and coworkers [Physical Review Letters, {103}, 056402 (2009)], finding quite good agreement. In contrast, a model with only isotropic exchange and long range magnetostatic dipoles gives rise to a local susceptiblity that is inconsistent with the data.
Gingras Michel J. -P.
McClarty Paul A.
Thompson Daniel J.
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