Nanosurface-confined anisotropic growth and magnetism of ellipsoidal α-Fe nanogranules

Seung Hun Huh; Chang Yeoul Kim; Doh Hyung Riu; Yosuke Taguchi; Atsushi Nakajima

doi:10.1166/jnn.2008.264

Nanosurface-confined anisotropic growth and magnetism of ellipsoidal α-Fe nanogranules

Seung Hun Huh, Chang Yeoul Kim, Doh Hyung Riu, Yosuke Taguchi, Atsushi Nakajima

Department of Chemistry

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

Abstract

We have investigated the nanosurface-confined anisotropic growth of ordered-ellipsoidal Fe nanogranules when an Fe plume was deposited at a slanting angle onto an anodized aluminum oxide (AAO) film. Layer-by-layer growth was also investigated. This growth is driven by two critical factors: (1) a new rhombic AAO cell and (2) the slanting deposition of the Fe plume. During slanting deposition, the rhombic AAO cell induces strong restrictions in the nucleation site, growth direction, and granular size; therefore, the degree of freedom during growth is restricted. The magnetic dipoles of the ordered Fe nanogranules are placed along the long axis of the ellipsoid at an angle of 180° (antiparallel) due to the demagnetizing field, shape anisotropy, and magnetic dipole-to-dipole interactions.

Original language	English
Pages (from-to)	1959-1964
Number of pages	6
Journal	Journal of Nanoscience and Nanotechnology
Volume	8
Issue number	4
DOIs	https://doi.org/10.1166/jnn.2008.264
Publication status	Published - 2008 Apr 1

Keywords

AAO
Anisotropic growth
Fe ellipsoid
Laser ablation
Magnetic spin
Nanomagnetism

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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10.1166/jnn.2008.264

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title = "Nanosurface-confined anisotropic growth and magnetism of ellipsoidal α-Fe nanogranules",

abstract = "We have investigated the nanosurface-confined anisotropic growth of ordered-ellipsoidal Fe nanogranules when an Fe plume was deposited at a slanting angle onto an anodized aluminum oxide (AAO) film. Layer-by-layer growth was also investigated. This growth is driven by two critical factors: (1) a new rhombic AAO cell and (2) the slanting deposition of the Fe plume. During slanting deposition, the rhombic AAO cell induces strong restrictions in the nucleation site, growth direction, and granular size; therefore, the degree of freedom during growth is restricted. The magnetic dipoles of the ordered Fe nanogranules are placed along the long axis of the ellipsoid at an angle of 180° (antiparallel) due to the demagnetizing field, shape anisotropy, and magnetic dipole-to-dipole interactions.",

keywords = "AAO, Anisotropic growth, Fe ellipsoid, Laser ablation, Magnetic spin, Nanomagnetism",

author = "Huh, {Seung Hun} and Kim, {Chang Yeoul} and Riu, {Doh Hyung} and Yosuke Taguchi and Atsushi Nakajima",

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AU - Huh, Seung Hun

AU - Kim, Chang Yeoul

AU - Riu, Doh Hyung

AU - Taguchi, Yosuke

AU - Nakajima, Atsushi

PY - 2008/4/1

Y1 - 2008/4/1

N2 - We have investigated the nanosurface-confined anisotropic growth of ordered-ellipsoidal Fe nanogranules when an Fe plume was deposited at a slanting angle onto an anodized aluminum oxide (AAO) film. Layer-by-layer growth was also investigated. This growth is driven by two critical factors: (1) a new rhombic AAO cell and (2) the slanting deposition of the Fe plume. During slanting deposition, the rhombic AAO cell induces strong restrictions in the nucleation site, growth direction, and granular size; therefore, the degree of freedom during growth is restricted. The magnetic dipoles of the ordered Fe nanogranules are placed along the long axis of the ellipsoid at an angle of 180° (antiparallel) due to the demagnetizing field, shape anisotropy, and magnetic dipole-to-dipole interactions.

AB - We have investigated the nanosurface-confined anisotropic growth of ordered-ellipsoidal Fe nanogranules when an Fe plume was deposited at a slanting angle onto an anodized aluminum oxide (AAO) film. Layer-by-layer growth was also investigated. This growth is driven by two critical factors: (1) a new rhombic AAO cell and (2) the slanting deposition of the Fe plume. During slanting deposition, the rhombic AAO cell induces strong restrictions in the nucleation site, growth direction, and granular size; therefore, the degree of freedom during growth is restricted. The magnetic dipoles of the ordered Fe nanogranules are placed along the long axis of the ellipsoid at an angle of 180° (antiparallel) due to the demagnetizing field, shape anisotropy, and magnetic dipole-to-dipole interactions.

KW - AAO

KW - Anisotropic growth

KW - Fe ellipsoid

KW - Laser ablation

KW - Magnetic spin

KW - Nanomagnetism

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JO - Journal of Nanoscience and Nanotechnology

JF - Journal of Nanoscience and Nanotechnology

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ER -

Nanosurface-confined anisotropic growth and magnetism of ellipsoidal α-Fe nanogranules

Abstract

Keywords

ASJC Scopus subject areas

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