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Domain Topology of Micron-Scale, Ferromagnetic Pancakes

Published online by Cambridge University Press:  15 February 2011

Peter J. Bedrossian ,
Matthew R. Gibbons  and
Charles J. Cerjan
Peter J. Bedrossian
Affiliation:
Lawrence Livermore National Laboratory, Livermore CA 94551
Matthew R. Gibbons
Affiliation:
Lawrence Livermore National Laboratory, Livermore CA 94551
Charles J. Cerjan
Affiliation:
Lawrence Livermore National Laboratory, Livermore CA 94551
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Abstract

Planar, micron-scale ellipses patterned from 700Å-thick Co films exhibit nearly-complete suppression of hysteresis when magnetized in-plane along their short axes. Using a combination of Magnetic Force Microscopy and Vibrating Sample Magnetometry, we find that the suppression of hysteresis is associated with the continuous deformation of a dipole field configuration. The presence of hysteresis for in-plane, long-axis magnetization is associated with transitions between topologically inequivalent configurations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 475: Symposium M – Magnetic Ultrathin Films, Multilayers, and Surfaces – 1997 , 1997 , 277
Copyright
Copyright © Materials Research Society 1997

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References

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