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Spin-lozenge thermodynamics and magnetic excitations in Na3RuO4
2009
Journal of Physics: Condensed Matter
We report inelastic and elastic neutron scattering, magnetic susceptibility, and heat capacity measurements of polycrystalline sodium ruthenate (Na_3RuO_4). Previous work suggests this material consists of isolated tetramers of S=3/2 Ru^5+ ions in a so-called "lozenge" configuration. Using a Heisenberg antiferromagnet Hamiltonian, we analytically determine the energy eigenstates for general spin S. From this model, the neutron scattering cross-sections for excitations associated with spin-3/2
doi:10.1088/0953-8984/21/50/506003
pmid:21836228
fatcat:qxedl7nfwbgn5awddelchyc6ku