Multi-vortex states in magnetic nanoparticles

We demonstrate a fabrication technique to create cylindrical NiFe magnetic nanoparticles (MNPs) with controlled dimensions and composition. MNPs thicker than 200 nm can form a double vortex configuration, which consists of a pair of vortices with opposite chirality. When MNPs thicker than 300 nm are...

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Main Authors:	Gan, W. L., Chandra Sekhar, M., Wong, D. W., Purnama, I., Chiam, S. Y., Wong, L. M., Lew, W. S.
Other Authors:	School of Physical and Mathematical Sciences
Format:	Article
Language:	English
Published:	2014
Subjects:	DRNTU::Science::Physics::Atomic physics::Solid state physics
Online Access:	https://hdl.handle.net/10356/101721 http://hdl.handle.net/10220/24221
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Institution:	Nanyang Technological University
Language:	English

id	sg-ntu-dr.10356-101721
record_format	dspace
spelling	sg-ntu-dr.10356-1017212023-02-28T19:23:07Z Multi-vortex states in magnetic nanoparticles Gan, W. L. Chandra Sekhar, M. Wong, D. W. Purnama, I. Chiam, S. Y. Wong, L. M. Lew, W. S. School of Physical and Mathematical Sciences DRNTU::Science::Physics::Atomic physics::Solid state physics We demonstrate a fabrication technique to create cylindrical NiFe magnetic nanoparticles (MNPs) with controlled dimensions and composition. MNPs thicker than 200 nm can form a double vortex configuration, which consists of a pair of vortices with opposite chirality. When MNPs thicker than 300 nm are relaxed after saturation, it forms a frustrated triple vortex state which produces a higher net magnetization as verified by light transmissivity measurements. Therefore, a greater magnetic torque can be actuated on a MNP in the triple vortex state. Published version 2014-11-11T02:05:31Z 2019-12-06T20:43:18Z 2014-11-11T02:05:31Z 2019-12-06T20:43:18Z 2014 2014 Journal Article Gan, W. L., Chandra Sekhar, M., Wong, D. W., Purnama, I., Chiam, S. Y., Wong, L. M., et al. (2014). Multi-vortex states in magnetic nanoparticles. Applied physics letters, 105(15). https://hdl.handle.net/10356/101721 http://hdl.handle.net/10220/24221 10.1063/1.4898349 en Applied physics letters © 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4898349]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 6 p. application/pdf
institution	Nanyang Technological University
building	NTU Library
continent	Asia
country	Singapore Singapore
content_provider	NTU Library
collection	DR-NTU
language	English
topic	DRNTU::Science::Physics::Atomic physics::Solid state physics
spellingShingle	DRNTU::Science::Physics::Atomic physics::Solid state physics Gan, W. L. Chandra Sekhar, M. Wong, D. W. Purnama, I. Chiam, S. Y. Wong, L. M. Lew, W. S. Multi-vortex states in magnetic nanoparticles
description	We demonstrate a fabrication technique to create cylindrical NiFe magnetic nanoparticles (MNPs) with controlled dimensions and composition. MNPs thicker than 200 nm can form a double vortex configuration, which consists of a pair of vortices with opposite chirality. When MNPs thicker than 300 nm are relaxed after saturation, it forms a frustrated triple vortex state which produces a higher net magnetization as verified by light transmissivity measurements. Therefore, a greater magnetic torque can be actuated on a MNP in the triple vortex state.
author2	School of Physical and Mathematical Sciences
author_facet	School of Physical and Mathematical Sciences Gan, W. L. Chandra Sekhar, M. Wong, D. W. Purnama, I. Chiam, S. Y. Wong, L. M. Lew, W. S.
format	Article
author	Gan, W. L. Chandra Sekhar, M. Wong, D. W. Purnama, I. Chiam, S. Y. Wong, L. M. Lew, W. S.
author_sort	Gan, W. L.
title	Multi-vortex states in magnetic nanoparticles
title_short	Multi-vortex states in magnetic nanoparticles
title_full	Multi-vortex states in magnetic nanoparticles
title_fullStr	Multi-vortex states in magnetic nanoparticles
title_full_unstemmed	Multi-vortex states in magnetic nanoparticles
title_sort	multi-vortex states in magnetic nanoparticles
publishDate	2014
url	https://hdl.handle.net/10356/101721 http://hdl.handle.net/10220/24221
_version_	1759856505535856640

Multi-vortex states in magnetic nanoparticles

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