Local susceptibility of the Yb(2)Ti(2)O(7) rare earth pyrochlore computed from 
a Hamiltonian with anisotropic exchange

Thompson, J. D.; McClarty, P. A.; Gingras, M. J. P.

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Local susceptibility of the Yb(2)Ti(2)O(7) rare earth pyrochlore computed from a Hamiltonian with anisotropic exchange

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McClarty, P. A.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Thompson, J. D., McClarty, P. A., & Gingras, M. J. P. (2011). Local susceptibility of the Yb(2)Ti(2)O(7) rare earth pyrochlore computed from a Hamiltonian with anisotropic exchange. Journal of Physics-Condensed Matter, 23(16 Sp. Iss. SI): 164219.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-8D15-C

Abstract

The rare earth pyrochlore magnet Yb(2)Ti(2)O(7) 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 paper, we compute the local sublattice susceptibility of Yb(2)Ti(2)O(7) from the proposed model and compare with the measurements of Cao et al (2009 Phys. Rev. Lett. 103 056402), finding quite good agreement. In contrast, a model with only isotropic exchange and long range magnetostatic dipolar interactions gives rise to a local susceptibility that is inconsistent with the data.