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Monte Carlo Simulation of Magnetization Reversal Via Domain-Wall Motion in Fe Sesquilayers on W(110)

Published online by Cambridge University Press:  10 February 2011

M. Kolesik ,
M. A. Novotny  and
Per Arne Rikvold
M. Kolesik
Affiliation:
Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306–4130 Institute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84228 Bratislava, Slovak Republic
M. A. Novotny
Affiliation:
Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306–4130 Department of Electrical Engineering, 2525 Pottsdamer Street, Florida A&M University-Florida State University, Tallahassee, Florida 32310–6046
Per Arne Rikvold
Affiliation:
Supercomputer Computations Research Institute, Florida State University, Tallahassee, Florida 32306–4130 Center for Materials Research and Technology and Department of Physics, Florida State University, Tallahassee, Florida 32306–4350
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Abstract

Iron sesquilayers are ultrathin films with coverages between one and two atomic mono-layers. They consist of an almost defect-free monolayer with compact islands of a second atomic layer on top. This variation of the film thickness results in a strong interaction between domain walls and the island structure. It makes these systems an ideal laboratory to study the dynamics of domain walls driven by weak external fields. We present computer simulations which provide insight into the role of the thermally activated nucleation processes by which a driven domain wall overcomes the obstacles created by the islands.

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References

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