Magnetic properties of the Shastry-Sutherland lattice material BaNd${}_2$ZnO${}_5$

Abstract

We investigate the physical properties of the Shastry-Sutherland lattice material BaNd${}_2$ZnO${}_5$. Neutron diffraction, magnetic susceptibility, and specific heat measurements reveal antiferromagnetic order below 1.65 K. The magnetic order is found to be a 2-$\mathbf{Q}$ magnetic structure with the magnetic moments lying in the Shastry-Sutherland lattice planes comprising the tetragonal crystal structure of BaNd${}_2$ZnO${}_5$. The ordered moment for this structure is 1.9(1) ${\mu }_B$ per Nd ion. Inelastic neutron scattering measurements reveal that the crystal field ground state doublet is well separated from the first excited state at 8 meV. The crystal field Hamiltonian is determined through simultaneous refinement of models with both the LS coupling and intermediate coupling approximations to the inelastic neutron scattering and magnetic susceptibility data. The ground state doublet indicates that the magnetic moments lie primarily in the basal plane with magnitude consistent with the size of the determined ordered moment.

arXiv comment13 pages, 8 figures

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Cited by in corpus (8)

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• Theory of rare-earth Kramers magnets on a Shastry-Sutherland lattice: dimer phases in presence of strong spin-orbit coupling
• Theory of magnetism for rare-earth magnets on the Shastry-Sutherland lattice with non-Kramers ions
• Observation of Unprecedented Fractional Magnetization Plateaus in a New Shastry-Sutherland Ising Compound
• Quantum entanglement of XY-type spin dimers in Shastry-Sutherland lattice
• Towards a Topological Quantum Chemistry description of correlated systems: the case of the Hubbard diamond chain