Long-lived spin waves in a metallic antiferromagnet.

ABSTRACT: Collective spin excitations in magnetically ordered crystals, called magnons or spin waves, can serve as carriers in novel spintronic devices with ultralow energy consumption. The generation of well-detectable spin flows requires long lifetimes of high-frequency magnons. In general, the lifetime of spin waves in a metal is substantially reduced due to a strong coupling of magnons to the Stoner continuum. This makes metals unattractive for use as components for magnonic devices. Here, we present the metallic antiferromagnet CeCo₂P₂, which exhibits long-living magnons even in the terahertz (THz) regime. For CeCo₂P₂, our first-principle calculations predict a suppression of low-energy spin-flip Stoner excitations, which is verified by resonant inela

SUBMITTER: Poelchen G 

PROVIDER: S-EPMC10480465 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature