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Observation of the intrinsic Gilbert damping constant in Co/Ni multilayers independent of the stack number with perpendicular anisotropy

Title
Observation of the intrinsic Gilbert damping constant in Co/Ni multilayers independent of the stack number with perpendicular anisotropy
Authors
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
2013-03-11
Citation
Applied Physics Letters, 102(10)
Type
Article
Article Type
Article
Keywords
Anisotropy DistributionDampingGeometrical OpticsGilbert DampingGilbert Damping ConstantMagnetic AnisotropyMagneto-OpticalMulti-Layer SystemMulti-LayersOptical AnisotropyPerpendicular AnisotropyPerpendicular Magnetic AnisotropyStack-Numbers
ISSN
0003-6951
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/3251
DOI
10.1063/1.4795013
Publisher
American Institute of Physics Publishing
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles


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