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Intrinsic and extrinsic Gilbert damping in exchange-biased IrMn/Cu/CoFe trilayer films

Title
Intrinsic and extrinsic Gilbert damping in exchange-biased IrMn/Cu/CoFe trilayer films
Author(s)
Song, Hyon-SeokLee, Kyeong-DongYou, Chun-YeolYang, See-HunParkin, StuartPark, Byong-GukSohn, Jeong-WooHong, Jung-IlShin, Sung-Chul
Issued Date
2015-05
Citation
Applied Physics Express, v.8, no.5
Type
Article
Keywords
ANISOTROPYBILAYERSDampingDEPENDENCEExchange-Bias FieldsExchange FieldsExternal Magnetic FieldGilbert DampingGilbert Damping ConstantMagnetic FieldsMagnetic InhomogeneitiesMagnetismMagnetization ReversalSpacer Layer ThicknessTemPERATURETrilayer Film
ISSN
1882-0778
Abstract
We studied the intrinsic and extrinsic Gilbert damping constants measured with an all-optical method in an exchange-biased IrMn/Cu/CoFe trilayer system with various Cu-spacer layer thicknesses. To understand the effect of the exchange bias on damping, the strength of the exchange bias was controlled by the Cu-spacer layer. When the external magnetic field is high enough compared with the exchange fields, the intrinsic Gilbert damping constant is independent of the exchange bias field. On the other hand, under a low external magnetic field, the extrinsic Gilbert damping is dominant because of the magnetic inhomogeneities, and is strongly correlated with the exchange bias field. © 2015 The Japan Society of Applied Physics.
URI
http://hdl.handle.net/20.500.11750/5188
DOI
10.7567/APEX.8.053002
Publisher
Institute of Physics Publishing
Related Researcher
  • 홍정일 Hong, Jung-Il
  • Research Interests Electric and Magnetic Properties of Nanostructured Materials; Spintronics
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Appears in Collections:
Department of Physics and Chemistry Spin Nanotech Laboratory 1. Journal Articles

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