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The Influence of Grain-Boundary Structural Disorder on the Magnetic Properties of Nanocrystalline Nickel

Published online by Cambridge University Press:  21 February 2011

Barbara Szpunar ,
Uwe Erb ,
Karl T. Aust ,
Gino Palumbo  and
Laurent J. Lewis
Barbara Szpunar
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6
Uwe Erb
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, Ontario, Canada K7L 3N6
Karl T. Aust
Affiliation:
Department of Metallurgy and Materials Science, University of Toronto, Toronto, Ontario, Canada M5S 1A4
Gino Palumbo
Affiliation:
Ontario Hydro Research Division, 800 Kipling Ave, Toronto, Ontario, Canada M8Z 5S4
Laurent J. Lewis
Affiliation:
Département de physique et Groupe de recherche en physique et technologie des couches minces, Université de Montréal, Case postale 6128, Succursale A, Montréal, Québec, Canada H3C 3J7
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Abstract

The influence of grain boundaries on the magnetic properties of nanocrystalline nickel, in particular the ∑ = 3 and ∑ = 5 special grain boundaries and the extreme case of a purely amorphous sample, has been investigated. Our calculations reveal that the magnetic moment is rather insensitive to the structural disorder varying by at most 15 %. These results correlate extremely well with the recent observation in electrodeposited nickel that the magnetic moment depends very little on grain size, down to about 10 nm.

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References

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