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

K Mckay, P Papakonstantinou, PM Dodd, R Atkinson, RJ Pollard

Research output: Contribution to journalArticle

3 Citations (Scopus)

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.
LanguageEnglish
Pages41-47
JournalJOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume34
DOIs
Publication statusPublished - Jan 2001

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Coercive force
coercivity
Sputtering
sputtering
magnetic properties
microstructure
Microstructure
hardness
grain size
Hardness
Sputter deposition
Binary alloys
Saturation magnetization
binary alloys
Phase structure
plastic deformation
Plastic deformation
Nitrogen
spacing
saturation

Cite this

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title = "Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering",
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.",
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Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering. / Mckay, K; Papakonstantinou, P; Dodd, PM; Atkinson, R; Pollard, RJ.

In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, Vol. 34, 01.2001, p. 41-47.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering

AU - Mckay, K

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AU - Dodd, PM

AU - Atkinson, R

AU - Pollard, RJ

PY - 2001/1

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AB - 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.

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