Three-Dimensional Spin Fluctuations in Na0.75CoO2
L. M. Helme, A. T. Boothroyd, R. Coldea, D. Prabhakaran, D. A. Tennant, A. Hiess, J. Kulda
Abstract
We report polarized- and unpolarized-neutron scattering measurements of magnetic excitations in single-crystal Na0.75CoO2. The data confirm ferromagnetic correlations within the cobalt-layers and reveal antiferromagnetic correlations perpendicular to the layers, consistent with an A-type antiferromagnetic ordering. The magnetic modes propagating perpendicular to the layers are sharp, and reach a maximum energy of ~12 meV. From a minimal spin wave model, containing only nearest-neighbour Heisenberg exchange interactions, we estimate the inter- and intra-layer exchange constants to be 12.2 +/- 0.5 meV and -6 +/- 2 meV, respectively. We conclude that the magnetic fluctuations in Na0.75CoO2 are highly three-dimensional.
Create a lesson
Related papers
Resolving magnetic order and dynamics with polarized neutron scattering: a practical guide to longitudinal polarization analysis
Sijie Xu, Pengcheng Dai
Korringa factor in Dirac-nodal-line systems
Takahiko Sekine, Kanoda Kazushi
Repulsion-Driven Topological Superconductivity in Twisted MoTe2
Tianle Wang, Tomohiro Soejima, Norman Y. Yao et al.
Coexisting Kondo and Weyl-like transport in kagome heavy-fermion metal, YbyCo3Ge3-xSnx
M. P. Dubbelman, R. Meduri, T. M. Kyrk et al.
Collective Modes of Fractional States Beyond Landau Levels
Peleg Emanuel, Yuval Oreg
Thermal Phase Transition of Three Dimensional Orthogonal Metals
Inho Song, Minsu Park, Hanbit Oh et al.