Magnetization of electrodeposited nickel: Role of interstitial carbon

C. O'Reilly; S. Sanvito; F. M.F. Rhen; P. Stamenov; J. M.D. Coey

doi:10.1063/1.2162508

Magnetization of electrodeposited nickel: Role of interstitial carbon

C. O'Reilly, S. Sanvito, F. M.F. Rhen, P. Stamenov, J. M.D. Coey

Department of Physics

Trinity College Dublin

Research output: Contribution to journal › Article › peer-review

Abstract

The magnetization of nickel foils electrodeposited under different conditions was not usually found to differ significantly from that of the bulk (55.4 A m2 kg-1). However, some galvanostatically deposited films from a citrate-based electrolyte showed a lower magnetization, which was rose to the bulk value after annealing at 575 K, with no change in lattice parameter. Analysis of the influence of various lattice defects (nickel vacancies or interstitials, hydrogen or carbon impurities) using density functional theory indicates that nickel vacancies may be present in all of the films and that a nonequilibrium concentration of carbon interstitials is the likely explanation of the reduced magnetization in the citrate as-deposited nickel.

Original language	English
Article number	08J301
Pages (from-to)	-
Journal	Journal of Applied Physics
Volume	99
Issue number	8
DOIs	https://doi.org/10.1063/1.2162508
Publication status	Published - 2006

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AU - Stamenov, P.

AU - Coey, J. M.D.

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AB - The magnetization of nickel foils electrodeposited under different conditions was not usually found to differ significantly from that of the bulk (55.4 A m2 kg-1). However, some galvanostatically deposited films from a citrate-based electrolyte showed a lower magnetization, which was rose to the bulk value after annealing at 575 K, with no change in lattice parameter. Analysis of the influence of various lattice defects (nickel vacancies or interstitials, hydrogen or carbon impurities) using density functional theory indicates that nickel vacancies may be present in all of the films and that a nonequilibrium concentration of carbon interstitials is the likely explanation of the reduced magnetization in the citrate as-deposited nickel.

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Magnetization of electrodeposited nickel: Role of interstitial carbon

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