Incoherent magnetization reversal in nanowires

R. Skomski; H. Zeng; D. J. Sellmyer

doi:10.1016/S0304-8853(02)00527-9

Incoherent magnetization reversal in nanowires

R. Skomski, H. Zeng, D. J. Sellmyer

Physics and Astronomy

Research output: Contribution to journal › Conference article › peer-review

19 Scopus citations

Abstract

The hysteresis of very thin Fe, Co, and Ni nanowires is investigated by model calculations. The considered wires are electrodeposited into self-assembled porous anodic alumina and characterized by wire diameters down to less than 10 nm. The diameter of the wires is smaller than the coherence diameter and therefore favors coherent rotation as compared to curling, but due to imperfections the reversal mode is localized. The localization length is calculated as a function of the wire inhomogenity, and it is shown that the localization reduces both the coercivity and the thermal activation volume (Barkhausen volume). The present calculation provides a semiquantitative explanation of the wires' experimental behavior.

Original language	English (US)
Pages (from-to)	175-180
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	249
Issue number	1-2
DOIs	https://doi.org/10.1016/S0304-8853(02)00527-9
State	Published - Aug 2002
Event	International Workshop on Magnetic Wires - San Sebastian, Spain Duration: Jun 20 2001 → Jun 22 2001

Keywords

Anisotropy
Coercivity
Magnetic viscosity
Nanowires
Transition metals

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/S0304-8853(02)00527-9

Cite this

@article{e1079ada315443989d93eba8ae2d92d5,

title = "Incoherent magnetization reversal in nanowires",

abstract = "The hysteresis of very thin Fe, Co, and Ni nanowires is investigated by model calculations. The considered wires are electrodeposited into self-assembled porous anodic alumina and characterized by wire diameters down to less than 10 nm. The diameter of the wires is smaller than the coherence diameter and therefore favors coherent rotation as compared to curling, but due to imperfections the reversal mode is localized. The localization length is calculated as a function of the wire inhomogenity, and it is shown that the localization reduces both the coercivity and the thermal activation volume (Barkhausen volume). The present calculation provides a semiquantitative explanation of the wires' experimental behavior.",

keywords = "Anisotropy, Coercivity, Magnetic viscosity, Nanowires, Transition metals",

author = "R. Skomski and H. Zeng and Sellmyer, {D. J.}",

note = "Funding Information: We are grateful to R.D. Kirby, Y. Liu, M. Zheng, and K. Nielsch for helpful discussions. This work has been supported by AFOSR, DOE, and the DARPA/ARO. ; International Workshop on Magnetic Wires ; Conference date: 20-06-2001 Through 22-06-2001",

year = "2002",

month = aug,

doi = "10.1016/S0304-8853(02)00527-9",

language = "English (US)",

volume = "249",

pages = "175--180",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Incoherent magnetization reversal in nanowires

AU - Skomski, R.

AU - Zeng, H.

AU - Sellmyer, D. J.

N1 - Funding Information: We are grateful to R.D. Kirby, Y. Liu, M. Zheng, and K. Nielsch for helpful discussions. This work has been supported by AFOSR, DOE, and the DARPA/ARO.

PY - 2002/8

Y1 - 2002/8

N2 - The hysteresis of very thin Fe, Co, and Ni nanowires is investigated by model calculations. The considered wires are electrodeposited into self-assembled porous anodic alumina and characterized by wire diameters down to less than 10 nm. The diameter of the wires is smaller than the coherence diameter and therefore favors coherent rotation as compared to curling, but due to imperfections the reversal mode is localized. The localization length is calculated as a function of the wire inhomogenity, and it is shown that the localization reduces both the coercivity and the thermal activation volume (Barkhausen volume). The present calculation provides a semiquantitative explanation of the wires' experimental behavior.

AB - The hysteresis of very thin Fe, Co, and Ni nanowires is investigated by model calculations. The considered wires are electrodeposited into self-assembled porous anodic alumina and characterized by wire diameters down to less than 10 nm. The diameter of the wires is smaller than the coherence diameter and therefore favors coherent rotation as compared to curling, but due to imperfections the reversal mode is localized. The localization length is calculated as a function of the wire inhomogenity, and it is shown that the localization reduces both the coercivity and the thermal activation volume (Barkhausen volume). The present calculation provides a semiquantitative explanation of the wires' experimental behavior.

KW - Anisotropy

KW - Coercivity

KW - Magnetic viscosity

KW - Nanowires

KW - Transition metals

UR - http://www.scopus.com/inward/record.url?scp=0036701181&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036701181&partnerID=8YFLogxK

U2 - 10.1016/S0304-8853(02)00527-9

DO - 10.1016/S0304-8853(02)00527-9

M3 - Conference article

AN - SCOPUS:0036701181

SN - 0304-8853

VL - 249

SP - 175

EP - 180

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 1-2

T2 - International Workshop on Magnetic Wires

Y2 - 20 June 2001 through 22 June 2001

ER -

Incoherent magnetization reversal in nanowires

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this