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 Joseph Askey

Joseph Askey

Research student, School of Physics and Astronomy

Overview

I received my BSc (Hons) in Physics from the University of Bristol in 2017, and my MSc in Physics from Cardiff University in 2018. As of 2020, I am an Associate Fellow of the Higher Education Academy (AFHEA).


I am currently a PhD student (2018-2022) studying non-linear optical fabrication and characterisation techniques and how these can be applied to nanostructured magnetic and artificial biological systems, under the supervision of Dr. Sam Ladak and Prof. Wolfgang Langbein. 


I currently tutor on MSc level modules PXT991 (formerly PXT101/201 and PXT992 (formerly PXT102/202) with Dr. Richard Lewis and Prof. Paul Roche. 


Research

Research interests

My work currently focuses on: 



  • Nanostructured 3D magnetic systems including nanowires and curved nanowires. 

  • Non-linear optical techniques for the fabrication and characterisation of polymers and magnetic nanostructures. 

  • Non-linear optics for improving feature sizes and resolution in two-photon lithography.  

  • Electrochemistry and its application to magnetic nanostrucutre fabrication.

  • Micromagnetic simulations of nanostructured systems. 


Specifically I use the following techniques in my research:



  • Two-photon lithography and UV lithography.

  • Electrochemical and electroless deposition.

  • Scanning electron microscopy (SEM) and atomic force microscopy (AFM).

  • Magneto-optical Kerr effect (MOKE) magnetometry.

  • Finite difference micromagnetics (MuMax3, Ubermag). 


Publications



  • Askey, J., Hunt, M.O., Langbein, W., Ladak, S. Asymmetric dual Bloch point domain walls in cylindrical magnetic nanowires. APL Mater. 10, 071105 (2022).

  • May, A., Saccone, M., van den Berg, A., Askey, J., Hunt, M., Ladak, S. Magnetic charge propagation upon a 3D artificial spin-ice. Nat. Commun. 12, 3217 (2021).

  • Askey, J., Hunt, M.O., Langbein, W., Ladak, S. Use of Two-Photon Lithography with a Negative Resist and Processing to Realise Cylindrical Magnetic Nanowires. Nanomaterials 10, 429 (2020).

  • Hunt, M., Taverne, M., Askey, J., May, A., Van Den Berg, A., Ho, Y.-L.D., Rarity, J., Ladak, S. Harnessing Multi-Photon Absorption to Produce Three-Dimensional Magnetic Structures at the Nanoscale. Materials 13, 761 (2020).


Conferences



  • Askey, J., Hunt, M.O., Langbein, W., Ladak, S. Asymmetric dual Bloch point domain walls in cylindrical magnetic nanowires. Condensed Matter and Quantum Materials 2022.

  • Lewis, R., Roche, P., Anderson, M., Askey, J., Athikkat-Eknath, G., Norman, M., Sztranyovszky, Z. The Online Research Group Teaching Model: Ensuring Authentic and Robust Remote Learning for MSc Students. Cardiff University Learning and Teaching Conference 2021.

  • Anderson, M., Askey, J., Athikkat-Eknath, G., Norman, M., Sztranyovszky, Z. "The Research Group Teaching Model": PhD Students as Research Group Leaders, Mentors, and Role Models. Cardiff University Learning and Teaching Conference 2021. 

  • Askey, J., Hunt, M.O., Langbein, W., Ladak, S. Use of Two-Photon Lithography with a Negative Resist and Processing to Realise Cylindrical Magnetic Nanowires. 65th Annual Conference on Magnetism and Magnetic Materials 2020.

Teaching

I design and lead micro-project groups, plenary sessions, and demand-driven skills workshops for Physics and Astrophysics modules. These modules include:



  • PXT991 (formerly PXT101/201) - Advanced Experimental Techniques in Physics (2018-present)

  • PXT992 (formerly PXT102/202) - Study and Research Skills in Physics (2018-present)

  • PXT103 - Advanced LabVIEW Programming for Physicists (2018-2020)