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Observation of the intrinsic Gilbert damping constant in Co/Ni multilayers independent of the stack number with perpendicular anisotropy
- Observation of the intrinsic Gilbert damping constant in Co/Ni multilayers independent of the stack number with perpendicular anisotropy
- Song, HS[Song, Hyon-Seok]; Lee, KD[Lee, Kyeong-Dong]; Sohn, JW[Sohn, Jeong-Woo]; Yang, SH[Yang, See-Hun]; Parkin, SSP[Parkin, Stuart S. P.]; You, CY[You, Chun-Yeol]; Shin, SC[Shin, Sung-Chul]
- DGIST Authors
- Sohn, JW[Sohn, Jeong-Woo]; Shin, SC[Shin, Sung-Chul]
- Issue Date
- Applied Physics Letters, 102(10)
- Article Type
- Anisotropy Distribution; Damping; Geometrical Optics; Gilbert Damping; Gilbert Damping Constant; Magnetic Anisotropy; Magneto-Optical; Multi-Layer System; Multi-Layers; Optical Anisotropy; Perpendicular Anisotropy; Perpendicular Magnetic Anisotropy; Stack-Numbers
- We investigate the intrinsic Gilbert damping constant in perpendicular magnetic anisotropy Co/Ni multilayer system by means of an all-optical method. We find that the intrinsic Gilbert damping constant does not depend on the stack number and the perpendicular magnetic anisotropy when the magnetic field is high enough. In contrast, the extrinsic Gilbert damping is strongly correlated with the inhomogeneous anisotropy distribution in the low-field regime, as observed in magneto-optical images. Intriguingly, the extrinsic Gilbert damping is consistently reduced with decreasing length scale in the measurements, providing a concrete means to determine the intrinsic Gilbert damping. © 2013 American Institute of Physics.
- American Institute of Physics Publishing
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