Effect of Enhanced Damping Due to Spin-Motive Force on Field-Driven Domain Wall Motion

Temporal and spatial variation of magnetization generates an additional damping torque due to spin-motive force. We performed semi-one-dimensional (1-D) and two-dimensional (2-D) micromagnetic simulations to investigate effect of the additional damping on the field-driven transverse wall dynamics in...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2010-06, Vol.46 (6), p.2167-2170
Main Authors: Moon, Jung-Hwan, Seo, Soo-Man, Lee, Kyung-Jin
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Damping
Domain wall motion
Domain walls
Dynamic tests
Electric breakdown
Exact sciences and technology
Gilbert damping
Magnetic domain walls
Magnetic domains
Magnetic fields
Magnetism
Magnetization
Materials science
Mathematical models
micromagnetic simulation
Micromagnetics
Nanocomposites
Nanomaterials
Nanostructure
Other topics in materials science
Physics
Predictive models
spin-motive force
Torque
Two dimensional displays
Walls
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Summary:Temporal and spatial variation of magnetization generates an additional damping torque due to spin-motive force. We performed semi-one-dimensional (1-D) and two-dimensional (2-D) micromagnetic simulations to investigate effect of the additional damping on the field-driven transverse wall dynamics in a magnetic nanowire. At the magnetic field above the Walker breakdown field, the additional damping due to the spin-motive force causes an increase of domain wall velocity. In semi-1-D model, the amount of increased domain wall velocity is linearly proportional to the external magnetic field as predicted by theory. However, in 2-D model, it is inversely proportional to the field owing to the periodic injection of antivortex.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2010.2041909