Dr Julian DeanDr Julian Dean

Lecturer in Materials Science

Telephone:+44 (0) 114 222 5473
Email: j.dean@sheffield.ac.uk

Address: Department of Materials Science and Engineering
Sir Robert Hadfield Building, Mappin Street, Sheffield, S1 3JD

Julian Dean obtained his Masters in Physics (MPhys) from the University of Sheffield in 2004. His PhD award in 2007 on micro-electromechanical systems looked at incorporation of magnetostriction in magMEMS. Julian subsequently worked as a Research Associate in the Department of Science and Engineering materials on :-

  • The simulation of impedance spectroscopy: The analysis of electroceramic materials.
  • Artificial multiferroic materials
  • Magnetic micro electromechanical systems (MagMEMS): devices for bio-chemical and security
  • Magnetic phenomena on the nanoscale
  • The study of magnetoelasticity at surfaces and interfaces

In 2012 Julian was appointed to the role of University Teacher and then to the role of Lecturer in Materials Simulation in 2013, maintaining his research interests.

Research interests

  • Functional material responses - design and characterisation
  • Artificial multiferroic materials
  • The analysis of electroceramic materials
  • Magnetic phenomena on the nanoscale
  • The prediction, optimisation and development of permanent magnetic materials

Key Projects

  • The development of Impedance Spectroscopy to characterise electroceramics using finite element analysis
  • The simulation of strain interfaces of functional materials
  • Realistic microstructure generation for input into finite element simulations
  • Substitution and Sustainability in Functional Materials and Devices
  • Magnetic micro electromechanical systems (MagMEMS): devices for bio-chemical and security

Outreach and education

Julian is actively involved in public outreach and education, particularly with school age students. Working with Dr Dan Allwood and Dr Matthew Bryan, he assisted local Sixth Form students in conducting research on designing new magnetic hard drive materials. This work resulted in a research paper [J. Appl. Phys. 106, (2009) 053902] and an education paper on the project itself [Phys. Ed. 44 (2009) 627]. Julian was also co-awarded the 2009 Kroto Prize for Excellence in the Science Education of Young People.

He has run hands-on Materials outreach activities for school students from 5 – 18. These sessions include ‘High-performance composite chocolate’ (Ages 5-21) [Phys. Ed 48 2013] , ‘Magnets’ (Ages 7-11) and ‘Structural materials properties’ (Ages 14-18). Most recently worked with Dr Dan Allwood to develop a suite of Flash-based virtual experiments to support Physics A-level tuition (www.flashyscience.com). These have been used to deliver lessons to A-level (16-18 years) students and are used as part of graduate programmes.

Key publications

  • J.S. Dean, J.H. Harding and D.C. Sinclair;Simulation of Impedance Spectra for a Full Three Dimensional Ceramic Microstructure Using a Finite Element Model; J. Amer. Ceram. Soc (2013); DOI: 10.1111/jace.12750
  • Julian Dean, Katrin Thomson, Lisa Hollands, Joanna Bates, Melvyn Carter, Colin Freeman, Plato Kapranos and Russell Goodall, “Composite Material Design and Materials Selection Practical using Chocolate”, Physics Education, 48(2013) 465-471
  • J. S. Dean, M. T. Bryan, T. Schrefl and D. A. Allwood, Stress-based control of magnetic nanowire domain walls in artificial multiferroic systems, Journal of Applied Physics, 109 (2011).
  • G. Hrkac, J.S. Dean, D. A. Allwood, Nanowire spintronics for storage class memories and logic (invited), Philosophical Transactions of the Royal Society A (2011).
  • Dean J, Bryan MT, Morley NA, Hrkac G, Javed A, Gibbs MRJ, Allwood DA. (2011) Numerical study of the effective magnetocrystalline anisotropy and magnetostriction in polycrystalline FeGa films, Journal of Applied Physics, volume 110, no. 4.
  • Hrkac G, Dean J, Allwood DA. (2011) Nanowire spintronics for storage class memories and logic, Philos Trans A Math Phys Eng Sci, volume 369, no. 1948, pages 3214-3228, DOI:10.1098/rsta.2011.0138.
  • Dean J, Bryan MT, Hrkac G, Goncharov A, Freeman CL, Bashir MA, Schrefl T, Allwood DA. (2010) The incorporation of the Cauchy stress matrix tensor in micromagnetic simulations, Journal of Applied Physics, volume 108, no. 7.
  • Hrkac G, Woodcock TG, Freeman C, Goncharov A, Dean J, Schrefl T, Gutfleisch O. (2010) The role of local anisotropy profiles at grain boundaries on the coercivity of Nd2Fe14B magnets, Applied Physics Letters, volume 97, no. 23.
  • J. S. Dean A. Kovacs, A. Kohn D. A Allwood, T. Schrefl, Exchange interactions in Exchange biased polycrystalline/Amorphous bilayers, Applied Physics Letters 96 (2010).
  • D. A. Allwood, J. S. Dean. M. T. Bryan and A. Baker, Bringing science research into secondary schools, Physics Education 44 (2009).
  • Bashir MA, Schrefl T, Dean J, Goncharov A, Hrkac G, Allwood DA, Suess D. (2012) Head and bit patterned media optimization at areal densities of 2.5 Tbit/in2 and beyond, Journal of Magnetism and Magnetic Materials, volume 324, no. 3, pages 269-275.
  • Dean J, Kovacs A, Kohn A, Goncharov A, Bashir MA, Hrkac G, Allwood DA, Schrefl T. (2010) Exchange bias interactions in polycrystalline/amorphous bilayers, Applied Physics Letters, volume 96, no. 7.
  • A. Baker, M. Billard, K. Brown, A. Goadsby, S. Green, C. Howard, S. Kodippili, A. Newton, X. Ning, M. Stead, L. Vallance, L. Zang, D.A. Allwood, M. T. Bryan, J. S. Dean, A study of hard:soft layer ratios and angular switching in exchange coupled media, Journal of Applied Physics 106 (2009).