Title :
Tailoring Spin Relaxation in Thin Films by Tuning Extrinsic Relaxation Channels
Author :
Barsukov, Igor ; Meckenstock, Ralf ; Lindner, Jürgen ; Möller, Marc ; Hassel, Christoph ; Posth, Oliver ; Farle, Michael ; Wende, Heiko
Author_Institution :
Fak. fur Phys. & Center for Nanointegration, Univ. Duisburg-Essen, Duisburg, Germany
fDate :
6/1/2010 12:00:00 AM
Abstract :
The importance of extrinsic spin relaxation processes such as magnon-magnon scattering for the overall damping in ferromagnetic thin films has been shown for low relaxation rate systems. Due to its anisotropic behavior, it offers an opportunity for controlling and tailoring the spin relaxation. In this paper, a ferromagnetic resonance study of a system with pure Gilbert damping Fe94.5Si5.5/MgO(001) is shown. Fe3Si/MgO(001) systems with native magnon-magnon scattering are discussed. Possibilities for inducing magnon-magnon scattering by volume and surface defects in these systems are presented, offering a method for controlled tailoring of the overall damping in thin films.
Keywords :
damping; ferromagnetic materials; ferromagnetic relaxation; ferromagnetic resonance; iron alloys; magnesium compounds; magnetic anisotropy; magnetic thin films; magnons; silicon alloys; spin dynamics; Fe3Si/MgO(001) systems; Fe94.5Si5.5-MgO; anisotropic behavior; controlled tailoring; extrinsic relaxation channels; extrinsic spin relaxation processes; ferromagnetic resonance study; ferromagnetic thin films; low relaxation rate systems; native magnon-magnon scattering; overall damping; pure Gilbert damping; surface defects; Anisotropic magnetoresistance; Damping; Frequency dependence; Iron; Magnetic anisotropy; Magnetic resonance; Magnetization; Scattering; Torque; Transistors; Magnetic resonance; relaxation processes; thin films;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2044482
