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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
Authors
Song, Hyon-SeokLee, Kyeong-DongYou, Chun-YeolYang, See-HunParkin, StuartPark, Byong-GukSohn, Jeong-WooHong, Jung-IlShin, Sung-Chul
DGIST Authors
Hong, Jung-Il
Issue Date
2015-05
Citation
Applied Physics Express, 8(5)
Type
Article
Article Type
Article
Keywords
DampingExchange-Bias FieldsExchange FieldsExternal Magnetic FieldGilbert DampingGilbert Damping ConstantMagnetic FieldsMagnetic InhomogeneitiesMagnetismSpacer Layer ThicknessTrilayer 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
  • Author Hong, Jung Il Quantum Electric & Magnetic Materials Laboratory
  • Research Interests
Files:
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Collection:
Emerging Materials ScienceQuantum Electric & Magnetic Materials Laboratory1. Journal Articles


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