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Title: Multi-vortex states in magnetic nanoparticles
Authors: Gan, W. L.
Chandra Sekhar, M.
Wong, D. W.
Purnama, I.
Chiam, S. Y.
Wong, L. M.
Lew, W. S.
Keywords: DRNTU::Science::Physics::Atomic physics::Solid state physics
Issue Date: 2014
Source: 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).
Series/Report no.: Applied physics letters
Abstract: 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.
DOI: 10.1063/1.4898349
Rights: © 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: []. 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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