Two-photon lithography for 3D magnetic nanostructure fabrication

Gwilym I. Williams, Matthew Hunt, Benedikt Boehm, Andrew May, Mike P. C. Taverne, Daniel Ho, Sean Giblin, Dan Read, John G. Rarity, Rolf Allenspach, Sam Ladak

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)
4 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)845-854
Number of pages10
JournalNano Research
Volume11
Issue number2
Early online date12 Jul 2017
DOIs
Publication statusPublished - 1 Feb 2018

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