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Coqblin-Schrieffer interaction and magnetic orderings and excitations for cerium and light actinide monopnictides and monochalcogenides

Journal of Applied Physics, ISSN: 0021-8979, Vol: 53, Issue: 3, Page: 1988-1990
1982
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  • Citations
    7
    • Citation Indexes
      7

Article Description

The anisotropic Coqblin-Schrieffer (CS) interaction between the Ce ions, which arises from the hybridization of the localized 4f and the conduction electrons, is shown to give the overall magnetic ordering behaviors of cerium and light actinide monopnictides and monochalcogenides. With equal nearest neighbor and next nearest neighbor CS interactions, the near saturation colinear orderings observed in cerium monopnictides are stabilized; while for dominant nearest neighbor CS interaction, the canted ferromagnetic or 2k antiferromagnetic orderings, and the 3k ordering in the presence of the cubic crystal field, as observed in the uranium monopnictides are found to be stable. The excitation spectra in the colinear and 2k structures are strongly anisotropic, while in 3k ordering, the dispersion is nearly isotropic.

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