科研之友
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摘要
We report our investigation of the electronic and magnetic excitations of Sr3NiIrO6 by resonant inelastic x-ray scattering at the Ir L-3 edge. The intra-t(2g) electronic transitions are analyzed using an atomic model, including spin-orbit coupling and trigonal distortion of the IrO6 octahedron, confronted with ab initio quantum chemistry calculations. The Ir spin-orbital entanglement is quantified and its implications for the magnetic properties, in particular in inducing highly anisotropic magnetic interactions, are highlighted. These are included in the spin-wave model proposed to account for the dispersionless magnetic excitation that we observe at 90 meV. By counterbalancing the strong Ni2+ easy-plane anisotropy that manifests itself at high temperature, the anisotropy of the interactions finally leads to the remarkable easy-axis magnetism reported in this material at low temperature.
- 出版日期2016-6-1
- 单位中国地震局
