Direct observation of Barkhausen effect in strip-patterned ferromagnetic Co/Pd multilayer films

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The one-dimensional Barkhausen effect was observed in lithographically defined magnetic strips of Co/Pd multilayer films. The magnetic domain expanded stepwise with a constant speed between pinning sites. Both the wall propagation and the pinning were characterized by the thermal activation process based on their exponential dependency on the strength of the applied magnetic field. The Barkhausen volume was determined to be 1.7x10(-13) cm(3), which was several orders larger than the activation volume of the wall propagation, 6.5x10(-18) cm(3). (c) 2006 American Institute of Physics.
Publisher
AMER INST PHYSICS
Issue Date
2006-05
Language
English
Article Type
Article
Keywords

SELF-ORGANIZED CRITICALITY; MAGNETIZATION REVERSAL; PERPENDICULAR ANISOTROPY; ION IRRADIATION; NOISE

Citation

JOURNAL OF APPLIED PHYSICS, v.99, pp.850 - 858

ISSN
0021-8979
DOI
10.1063/1.2199978
URI
http://hdl.handle.net/10203/13937
Appears in Collection
RIMS Journal Papers
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