Magnetic ordering and spin dynamics in the S=5/2 staggered triangular lattice antiferromagnet Ba2MnTeO6

Article

关键词: ELECTRONIC-STRUCTURE;    NEUTRON-DIFFRACTION;    HALDANE-GAP;    SCATTERING;    CSNICL3;   

DOI  :  10.1103/PhysRevB.102.094413

来源: SCIE

【 摘 要 】

We report studies of the magnetic properties of a staggered stacked triangular lattice Ba2MnTeO6 using magnetic susceptibility, specific heat, neutron powder diffraction, inelastic neutron scattering measurements, and first-principles density functional theory calculations. Neutron diffraction measurements reveal Ba2MnTeO6 to be antiferromagnetically ordered with a propagation vector k = (0.5, 0.5, 0) and Neel transition temperature of T-N approximate to 20 K. The dominant interaction derived from the Curie-Weiss fitting to the inverse DC susceptibility is antiferromagnetic. Modeling of the inelastic neutron scattering data with linear spin wave theory yielded magnetic exchange interactions for the nearest intralayer, nearest interlayer, and next-nearest interlayer of J(1) = 0.27(3), meV J(2) = 0.27(3) meV, and J(3) = -0.05(1) meV, respectively, and a small value of easy-axis anisotropy of D-zz = -0.01 meV. We derive a magnetic phase diagram that reveals a collinear stripe-type antiferromagnetic order that is stabilized by the competition between J(1), J(2), and J(3).

【 授权许可】

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