期刊
APPLIED PHYSICS LETTERS
卷 102, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4795013
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资金
- NRF funds of the Ministry of Education, Science and Technology of Korea [R0A-2007-000-200226-0, 2010-0023798, 2010-0022040]
- DGIST R&D Program of the Ministry of Education, Science and Technology of Korea [11-IT-01]
- National Research Foundation of Korea [2010-0022040, 2007-0056631, 2010-0023798] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4795013]
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