Astroid curves of high-moment antiferromagnetic nanoparticles with tunable magnetic properties

D. M. Forrester; E. Kovacs; K. E. Kürten; F. V. Kusmartsev

doi:10.1016/j.jmmm.2008.11.104

Astroid curves of high-moment antiferromagnetic nanoparticles with tunable magnetic properties

D. M. Forrester, E. Kovacs, K. E. Kürten, F. V. Kusmartsev

Physics

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

2 Scopus citations

Abstract

We have determined astroids for high-moment antiferromagnetic nanoparticles (AN), which have been recently discovered and used in numerous biomedical applications. The astroid curves for such a system, which is a stack of two isolated disk-shaped ferromagnetic nanoparticles interacting antiferromagnetically, show the regions in the magnetic field plane where different numbers of minima associated with stable or metastable states may exist. We describe the properties of these ANs and estimate their other characteristic parameters such as magnetic saturation field and exchange antiferrtomagnetic coupling. We argue that the finding of these astroids and the properties of ANs is crucial for the use of ANs in numerous applications and for modeling stable information storage devices.

Original language	British English
Pages (from-to)	903-905
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	321
Issue number	7
DOIs	https://doi.org/10.1016/j.jmmm.2008.11.104
State	Published - Apr 2009

Keywords

Disk-shaped magnetic nanoparticle
Stoner-Wohlfarth astroid

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10.1016/j.jmmm.2008.11.104

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title = "Astroid curves of high-moment antiferromagnetic nanoparticles with tunable magnetic properties",

abstract = "We have determined astroids for high-moment antiferromagnetic nanoparticles (AN), which have been recently discovered and used in numerous biomedical applications. The astroid curves for such a system, which is a stack of two isolated disk-shaped ferromagnetic nanoparticles interacting antiferromagnetically, show the regions in the magnetic field plane where different numbers of minima associated with stable or metastable states may exist. We describe the properties of these ANs and estimate their other characteristic parameters such as magnetic saturation field and exchange antiferrtomagnetic coupling. We argue that the finding of these astroids and the properties of ANs is crucial for the use of ANs in numerous applications and for modeling stable information storage devices.",

keywords = "Disk-shaped magnetic nanoparticle, Stoner-Wohlfarth astroid",

author = "Forrester, {D. M.} and E. Kovacs and K{\"u}rten, {K. E.} and Kusmartsev, {F. V.}",

note = "Funding Information: This work was supported by the European Science Foundation (ESF) in the framework of the network program “Arrays of Quantum Dots and Josephson Junctions”.",

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language = "British English",

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T1 - Astroid curves of high-moment antiferromagnetic nanoparticles with tunable magnetic properties

AU - Forrester, D. M.

AU - Kovacs, E.

AU - Kürten, K. E.

AU - Kusmartsev, F. V.

N1 - Funding Information: This work was supported by the European Science Foundation (ESF) in the framework of the network program “Arrays of Quantum Dots and Josephson Junctions”.

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N2 - We have determined astroids for high-moment antiferromagnetic nanoparticles (AN), which have been recently discovered and used in numerous biomedical applications. The astroid curves for such a system, which is a stack of two isolated disk-shaped ferromagnetic nanoparticles interacting antiferromagnetically, show the regions in the magnetic field plane where different numbers of minima associated with stable or metastable states may exist. We describe the properties of these ANs and estimate their other characteristic parameters such as magnetic saturation field and exchange antiferrtomagnetic coupling. We argue that the finding of these astroids and the properties of ANs is crucial for the use of ANs in numerous applications and for modeling stable information storage devices.

AB - We have determined astroids for high-moment antiferromagnetic nanoparticles (AN), which have been recently discovered and used in numerous biomedical applications. The astroid curves for such a system, which is a stack of two isolated disk-shaped ferromagnetic nanoparticles interacting antiferromagnetically, show the regions in the magnetic field plane where different numbers of minima associated with stable or metastable states may exist. We describe the properties of these ANs and estimate their other characteristic parameters such as magnetic saturation field and exchange antiferrtomagnetic coupling. We argue that the finding of these astroids and the properties of ANs is crucial for the use of ANs in numerous applications and for modeling stable information storage devices.

KW - Disk-shaped magnetic nanoparticle

KW - Stoner-Wohlfarth astroid

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DO - 10.1016/j.jmmm.2008.11.104

M3 - Article

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 7

ER -

Astroid curves of high-moment antiferromagnetic nanoparticles with tunable magnetic properties

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Keywords

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