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Updated: Aug 8, 2026

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Published on: May 27, 2020
Magnon spectra of multi-sublattice compounds from first principles
Tariq Hadji1,2
1Laboratory for Theoretical Physics and Material Physics, Hassiba Benbouali University of Chlef, Chlef, Algeria.
None:
We investigate the zero-temperature magnon spectra of collinear multi-sublattice magnetic systems using the Holstein-Primakoff formalism. We model the itinerant magnetism from first principles by utilizing exchange parameters derived from density functional theory. The developed theoretical framework-which yields expressions for the magnon dynamical matrix, group velocity and spin-wave stiffness-is then applied to three distinct Heusler compounds: the ferrimagnet MnCoAl, the ferromagnet CoMnSi, and the fully compensated ferrimagnet MnLiAl. By successfully capturing behaviors ranging from standard parabolic ferromagnetic dispersions to complex linear antiferromagnetic dynamics, the present formalism provides a systematic framework for evaluating spin-wave parameters.
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