Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition

Jun Zhang, Grenville A. Jones, Tiehan H. Shen, Steve E. Donnelly, Guanghai Li

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Cobalt nanowire arrays have been grown onto anodic aluminum oxide templates by using a pulse dc electrodeposition technique. We demonstrate that the crystal structure, grain size, and related magnetic properties can be controlled by applying different pulse frequencies. For a pulse frequency of 25 Hz, monocrystalline hexagonal-close-packed Co nanowires are formed with a well defined [10 1- 0] growth axis along the wire length. At a higher pulse frequency of 1000 Hz, face-centered-cubic Co nanowires are deposited with a small grain size and a preferred [111] texture directed along the length of the wire. Possible mechanisms for the observed growth characterization are discussed. An investigation of the corresponding magnetic properties indicates that the fcc Co nanowire arrays have the larger coercivity and squareness values: reasons for this behavior are explored.

LanguageEnglish
Article number054310
JournalJournal of Applied Physics
Volume101
Issue number5
Early online date9 Mar 2007
DOIs
Publication statusPublished - 23 Mar 2007
Externally publishedYes

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electrodeposition
nanowires
pulses
grain size
wire
magnetic properties
coercivity
cobalt
templates
textures
aluminum oxides
crystal structure

Cite this

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title = "Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition",
abstract = "Cobalt nanowire arrays have been grown onto anodic aluminum oxide templates by using a pulse dc electrodeposition technique. We demonstrate that the crystal structure, grain size, and related magnetic properties can be controlled by applying different pulse frequencies. For a pulse frequency of 25 Hz, monocrystalline hexagonal-close-packed Co nanowires are formed with a well defined [10 1- 0] growth axis along the wire length. At a higher pulse frequency of 1000 Hz, face-centered-cubic Co nanowires are deposited with a small grain size and a preferred [111] texture directed along the length of the wire. Possible mechanisms for the observed growth characterization are discussed. An investigation of the corresponding magnetic properties indicates that the fcc Co nanowire arrays have the larger coercivity and squareness values: reasons for this behavior are explored.",
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Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition. / Zhang, Jun; Jones, Grenville A.; Shen, Tiehan H.; Donnelly, Steve E.; Li, Guanghai.

In: Journal of Applied Physics, Vol. 101, No. 5, 054310, 23.03.2007.

Research output: Contribution to journalArticle

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T1 - Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition

AU - Zhang, Jun

AU - Jones, Grenville A.

AU - Shen, Tiehan H.

AU - Donnelly, Steve E.

AU - Li, Guanghai

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AB - Cobalt nanowire arrays have been grown onto anodic aluminum oxide templates by using a pulse dc electrodeposition technique. We demonstrate that the crystal structure, grain size, and related magnetic properties can be controlled by applying different pulse frequencies. For a pulse frequency of 25 Hz, monocrystalline hexagonal-close-packed Co nanowires are formed with a well defined [10 1- 0] growth axis along the wire length. At a higher pulse frequency of 1000 Hz, face-centered-cubic Co nanowires are deposited with a small grain size and a preferred [111] texture directed along the length of the wire. Possible mechanisms for the observed growth characterization are discussed. An investigation of the corresponding magnetic properties indicates that the fcc Co nanowire arrays have the larger coercivity and squareness values: reasons for this behavior are explored.

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