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

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-resolv...

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Veröffentlicht in:Applied physics letters 2013-07, Vol.103 (2)
Hauptverfasser: Song, Hyon-Seok, Lee, Kyeong-Dong, Sohn, Jeong-Woo, Yang, See-Hun, Parkin, Stuart S. P., You, Chun-Yeol, Shin, Sung-Chul
Format: Artikel
Sprache:eng
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Zusammenfassung: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/cm3. 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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4813542