Relationship between Gilbert damping and magneto-crystalline anisotropy in a Ti-buffered Co/Ni multilayer system

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The relationship between Gilbert damping and magneto-crystalline anisotropy is studied here using an all-optical method in a perpendicular Co/Ni multilayer system by varying the Ti-buffer thickness. As the Ti-buffer thickness increases, the magneto-crystalline anisotropy is enhanced. The time-resolved Kerr signal of each sample is well described by its own intrinsic Gilbert damping constant in a wide range of the external magnetic field. Interestingly, we find that Gilbert damping constants increase linearly from 0.021 to 0.036 when the magneto-crystalline anisotropy of the samples varies from 2.4 to 3.4 Merg/cm(3). Such a linear relationship implies that the spin-orbit interaction is the main source of the damping process through spin-lattice relaxation in our system. (C) 2013 AIP Publishing LLC.
Publisher
AMER INST PHYSICS
Issue Date
2013-07
Language
English
Article Type
Article
Keywords

DYNAMICS; METALS

Citation

APPLIED PHYSICS LETTERS, v.103, no.2, pp.022406 - 022406-4

ISSN
0003-6951
DOI
10.1063/1.4813542
URI
http://hdl.handle.net/10203/175084
Appears in Collection
RIMS Journal Papers
Files in This Item
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