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Journal of Applied Physics / Volume 101 / Issue 2 / MAGNETISM AND SUPERCONDUCTIVITY

J. Appl. Phys. 101, 023909 (2007); http://dx.doi.org/10.1063/1.2431399 (4 pages)

Origins of switching field distributions in perpendicular magnetic nanodot arrays

Justin M. Shaw1, William H. Rippard1, Stephen E. Russek1, Timothy Reith2, and Charles M. Falco2

1National Institute of Standards and Technology, Boulder, Colorado 80305
2College of Optical Sciences, University of Arizona, Tucson, Arizona 85721

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(Received 16 November 2006; accepted 17 November 2006; published online 19 January 2007)

We studied the reversal properties of perpendicularly magnetized Co/Pd nanodots from 100 to 50 nm in diameter fabricated using electron beam lithography. Polycrystalline Co/Pd multilayers show considerable differences in the switching field distribution (SFD) depending on the seed layer used. With a Ta seed layer, we reduced the SFD to approximately 5% of the average switching field. To rule out effects of grain boundaries, we also fabricated nanodot arrays from epitaxial Co/Pd superlattices. Although significant improvement in SFDs are obtained using epitaxial superlattices, our results indicate that grain boundary variation within nanodots is not the primary origin of SFD broadening that occurs with nanopatterning.

© 2007 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENT
  3. RESULTS
  4. DISCUSSION
  5. SUMMARY

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KEYWORDS and PACS

Keywords

cobalt, palladium, ferromagnetic materials, quantum dots, nanostructured materials, magnetic multilayers, metallic superlattices, epitaxial layers, magnetisation reversal, magnetic switching

PACS

  • 75.60.Jk

    Magnetization reversal mechanisms

  • 75.50.Cc

    Other ferromagnetic metals and alloys

  • 75.50.Tt

    Fine-particle systems; nanocrystalline materials

  • 75.75.-c

    Magnetic properties of nanostructures

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2431399

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

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