发表机构
University of Iowa; Stanford University; Eindhoven University of Technology(爱荷华大学; 斯坦福大学; 埃因霍温理工大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
该研究通过位点特异性Al/Li有序化实现亚铁磁绝缘态,结合从头算揭示自旋-晶格模式杂化,为低损耗磁子学器件提供微观机制。
AI 中文摘要
最小化磁阻尼同时理解自旋-晶格相互作用仍是磁子学的一个关键挑战。我们展示了尖晶石铁氧体中位点特异性的Al/Li有序化驱动了亚铁磁绝缘态,淬灭了费米能级态密度。从头算计算揭示了集体声学模式以及四面体和八面体网络上亚晶格选择性光学模式,为替代驱动的自旋动力学提供了微观理解。关键的是,低频磁子和声学声子模式相交,驱动强杂化,有利于低损耗技术。
英文摘要
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.
Comments8 pages and 3 figures