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arXiv · 2609.20618

Spin-Lattice Dynamics and Interactions in Magnonic Spinels

Hari Paudyal·Yuri Suzuki·Michael E. Flatté·Durga Paudyal
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Abstract

Minimizing magnetic damping while understanding spin-lattice interactions remains a key challenge for magnonics. We show site-specific Al/Li ordering in spinel ferrites drives a ferrimagnetic insulating state, quenching the Fermi-level density of states. \textit{Ab initio} calculations reveal collective acoustic modes alongside sub-lattice-selective optical modes on tetrahedral and octahedral networks, providing a microscopic understanding of substitution-driven spin dynamics. Crucially, the low-frequency magnon and acoustic phonon modes intersect, driving strong hybridization for low-loss technologies.

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Hari Paudyal, Yuri Suzuki, Michael E. Flatté, Durga Paudyal. 2026-09-17. Spin-Lattice Dynamics and Interactions in Magnonic Spinels. https://arxiv.org/abs/2609.20618

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