Document Type
Article
Publication Date
2011
Abstract
The magnetization dynamics of Co(5 nm)/Ru/Co(5 nm) trilayers with Ru thicknesses from 0.3–0.6 nm is experimentally and theoretically investigated. The coupling between the Co layers is antiferromagnetic (AFM) and yields a stable AFM domain structure with frozen domain walls. Comparing high-resolution magnetic force microscopy (MFM) and pump-probe measurements, we analyze the behavior of the films for different field-strength regimes. For moderate magnetic fields, pump-probe measurements provide dynamic characterization of the coupled precessional modes in the GHz range. The dynamics at small fields is realized by the pinning of AFM domain walls at inhomogeneities. The MFM images yield a domain-wall width that varies from about 150–60 nm. This behavior is explained in terms of a micromagnetic local-anisotropy model.
Recommended Citation
Li, Zhen, Ralph Skomski, Sy-Hwang Liou, Steven Michalski, Mircea Chipara, and Roger D. Kirby. 2011. “Magnetization Precession and Domain-Wall Structure in Cobalt-Ruthenium-Cobalt Trilayers.” Journal of Applied Physics 109 (7): 07C113. https://doi.org/10.1063/1.3540406.
Publication Title
Journal of Applied Physics
DOI
10.1063/1.3540406
Comments
© 2011 American Institute of Physics. Original published version available at https://doi.org/10.1063/1.3540406