Abstract
Enhancement of the spin relaxation rate in a monolayer ferromagnetic sheet due to adjacent normal metal layers is studied using a dynamic version of the Ruderman-Kittel-Kasuya-Yosida (RKKY) theory. We follow the previously published approach [E. \ifmmode \check{S}\else \v{S}\fi{}im\'anek and B. Heinrich, Phys. Rev. B 67, 144418 (2003)] in which the damping comes from the time lag of the RKKY oscillations induced by $s\ensuremath{-}d$ exchange interaction with the precessing magnetization. The present work extends this approach by incorporating into the transverse dynamic susceptibility the effect of the static inhomogeneous spin polarization due to the longitudinal component of the magnetization. The calculated excess Gilbert damping constant is found to agree with the spin pumping approach of Tserkovnyak et al. [Phys. Rev. Lett. 88, 117601 (2002)]. Comparison with this approach allows predictions to be made about the role of electron-electron interaction in the present theory.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
