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Two-photon lithography for 3D magnetic nanostructure fabrication

Williams, Gwilym, Hunt, Matthew, Boehm, Benedikt, May, Andrew, Taverne, Michael, Ho, Danie;, Giblin, Sean, Read, Daniel, Rarity, John, Allenspach, Rolf and Ladak, Sam 2018. Two-photon lithography for 3D magnetic nanostructure fabrication. Nano Research 11 (2) , pp. 845-854. 10.1007/s12274-017-1694-0

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Abstract

Ferromagnetic materials have been utilized as recording media in data storage devices for many decades. The confinement of a material to a two-dimensional plane is a significant bottleneck in achieving ultra-high recording densities, and this has led to the proposition of three-dimensional (3D) racetrack memories that utilize domain wall propagation along the nanowires. However, the fabrication of 3D magnetic nanostructures of complex geometries is highly challenging and is not easily achieved with standard lithography techniques. Here, we demonstrate a new approach to construct 3D magnetic nanostructures of complex geometries using a combination of two-photon lithography and electrochemical deposition. The magnetic properties are found to be intimately related to the 3D geometry of the structure, and magnetic imaging experiments provide evidence of domain wall pinning at the 3D nanostructured junction.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Springer Verlag
ISSN: 1998-0124
Funders: EPSRC
Date of First Compliant Deposit: 21 June 2017
Date of Acceptance: 28 May 2017
Last Modified: 29 May 2018 18:57
URI: http://orca-mwe.cf.ac.uk/id/eprint/101629

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