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Nanospheres generate out-of-plane magnetization

  • Large arrays of ordered magnetic nanostructures have been fabricated by sputter depositing Fe/Gd multilayers on an array of self-assembled nanospheres. On a planar substrate the system shows an in-plane magnetization whereas a spin reorientation transition (SRT) to out-of-plane orientation occurs on the spherules. This SRT cannot only be explained by the reduction in the shape anisotropy due to patterning of the extended film into nanometer sized islands. In fact, more important is the curved surface of the film on the nanocaps. Micromagnetic simulations of various geometries reveal that the crescent shape of the magnetic film on the spheres is ideal to get small values of the shape anisotropy for all diameters of the spheres, ranging from 1 μm down to 20 nm. The observed SRT enables a simple and cost effective bottom-up approach to produce patterned perpendicular magnetic nanostructures, having a high potential for magnetic data storage and spintronic applications.

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Author:Edward Amaladass, Bernd Ludescher, Gisela Schütz, Tolek Tyliszczak, Min-Sang Lee, Thomas EimüllerGND
DOI:https://doi.org/10.1063/1.3327797
Identifier:1089-7550 OPAC HS OPAC extern
Parent Title (English):Journal of Applied Physics
Publisher:AIP
Place of publication:Melville
Document Type:Article
Language:English
Year of first Publication:2010
Volume:Vol. 107
Issue:Issue 5
Number of pages:4 Seiten
First Page:053911-1
Last Page:053911-4
Institutes:Fakultät Maschinenbau
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften
Publication Lists:Eimüller, Thomas
Publication reviewed:begutachtet
Release Date:2020/08/26
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