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Title: Helical domain walls in constricted cylindrical NiFe nanowires
Authors: Tran, M.
Chandra Sekhar, M.
Liew, H. F.
Han, G. C.
Purnama, Indra
Lew, Wen Siang
Keywords: DRNTU::Science::Mathematics::Geometry
Issue Date: 2012
Source: Chandra, S. M., Liew, H. F., Purnama, I., Lew, W. S., Tran, M., & Han, G. C. (2012). Helical domain walls in constricted cylindrical NiFe nanowires. Applied Physics Letters, 101(15), 152406-.
Series/Report no.: Applied physics letters
Abstract: Reducing the magnetic shape anisotropy of a cylindrical NiFe nanowire allows the formation of two vortices with opposite chirality at the two ends. At relatively low aspect ratio these two vortices are connected via a gradual rotation of the magnetization over a short region, which forms a three-dimensional helical domain wall. Micromagnetic simulations reveal that it is possible to control the number of helical domain walls in the cylindrical nanowire by geometrical constrictions engineering. A technique to create constricted Ni95Fe5/Ni87Fe13 multilayered nanowires is demonstrated, and magnetic force microscopy imaging was carried out to confirm the prediction of simulated helical domain walls.
ISSN: 0003-6951
DOI: 10.1063/1.4758469
Rights: © 2012 American Institute of Physics. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. 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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