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Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Mckay , K, Papakonstantinou, P, Dodd, PM, Atkinson, R and Pollard, RJ (2001) Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering. JOURNAL OF PHYSICS D-APPLIED PHYSICS , 34 . pp. 41-47. [Journal article]

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URL: http://iopscience.iop.org/0022-3727/34/1/308/pdf/0022-3727_34_1_308.pdf

DOI: JOURNAL OF PHYSICS D-APPLIED PHYSICS

Abstract

FeTa and FeTaN thin films have been fabricated by sputter deposition from separate Fe and Ta magnetron sources. Microstructural investigations revealed that FeTa binary alloy films undergo a nanocrystalline to amorphous transition at about 17 at% Ta. This transition is associated with rapid simultaneous reductions in coercivity and saturation magnetization and increases in hardness and resistance to plastic deformation. Below 17 at% Ta the films exhibit a single-phase bcc structure and their lattice spacing increases linearly with Ta addition in agreement with Vegard's law, which indicates the incorporation of Ta in substitutional sites. The grain size and coercivity of the bcc binary films is seen to increase considerably with increasing Ta content. The addition of nitrogen causes a decrease in grain size, which is accompanied by a reduction in coercivity and an enhancement of hardness.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:14404
Deposited By:Professor Pagona Papakonstantinou
Deposited On:01 Jul 2010 09:19
Last Modified:18 Aug 2011 11:57

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