Research Themes
Magnetism in Nanostructures and Mesostructures
Patterning magnetic materials to the nanoscale (nanometres) or mesoscale (micrometres) creates lots of opportunities to study and exploit their properties for a range of applications, but particularly for novel information technologies and sensors.
Reducing the length scale of magnetic elements often allows control of properties such as magnetic domain structure, magnetisation reversal mechanisms, domain wall properties and spin-waves, which are important for high-speed (GHz) applications. This also allows magnetic systems to be produced with a range of engineered properties optimised for particular applications to explore certain phenomena.
We use sputtering or thermal evaporation to produce thin films and electron beam lithography or photolithography processes to create patterned elements. We then use a range of techniques to characterise their magnetic, electrical and structural properties.
We also use a range of computer modelling techniques to simulate the behaviour of magnetic structures.
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Projects
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MARCH
MARCH: Magnetic Architectures for Reservoir Computing Hardware MARCH aims to investigate design and performance possibilities of in materio reservoir computing (RC), a form of unconventional computation that is particularly well-suited to handling complex time-varying data. The project… -
Emergent Domain Wall Behaviour In Interconnected Nano Ring Arrays
This project investigates emergence arising from domain wall interactions at junctions between connected nano rings. The DW population of arrays can be analytically modelled against the probability of interactions occurring. Methods to measure the magnetisation of the array (itself linked to domain… -
Suppression of Stochastic Domain Wall Pinning Through Modified Gilbert Damping
This project investigates the stochastic behaviour of domain walls interacting at pinning sites within soft-ferromagnetic nanowires. Domain walls driven by externally-applied magnetic fields can undergo changes in their configuration. This changing structure can give rise to different…
Publications
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Enhancement of magnetostrictive properties of Galfenol thin films (spin project only)
Author | LR Nivedita , P Manivel, R Pandian, S Murugesan, N Morley, K Asokan and RTR Kumar
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Nanobugs as Drugs: Bacterial Derived Nanomagnets Enhance Tumor Targeting and Oncolytic Activity of HSV‐1 Virus
Author | F. H. N. Howard, H. Al‐Janabi, P. Patel, K. Cox, E. Smith, J. Vadakekolathu, A. G. Pockley, J. Conner, J. F. Nohl, D. A. Allwood, C. Collado‐Rojas, A. Kennerley, S. Staniland, and M. Muthana
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From stochasticity to functionality: harnessing magnetic domain walls for probabilistic and neuromorphic computing
Author | T. J. Hayward, I. T. Vidamour, M. O. A. Ellis, A. Welbourne, R. W. S. Dawidek, T. J. Broomhall, M. Chambard, M. Drouhin, A. M. Keogh, A. Mullen, S. J. Kyle, M. Al Mamoori, P. W. Fry, N.-J. Steinke, J. F. K. Cooper, F. Maccherozzi, S. Dhesi, L. Aballe, J. P
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Neuromorphic computation with a single magnetic domain wall
Author | R. V. Ababei, M. O. A. Ellis, I. T. Vidamour, D. S. Devadasan, D. A. Allwood, E. Vasilaki and T. J. Hayward
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Dynamically driven emergence in a nanomagnetic system
Author | R. W. Dawidek, T. J. Hayward, I. T. Vidamour, T. J. Broomhall, G. Venkat, M. Al Mamoori, A. Mullen, S. J. Kyle, P. W. Fry, N.‐J. Steinke, J. F. K. Cooper, F. Maccherozzi, S. S. Dhesi, L. Aballe, M. Foerster, J. Prat, E. Vasilaki, M. O. A. Ellis and D. A. A
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Selective Excitation of Localized Spin-Wave Modes by Optically Pumped Surface Acoustic Waves (both projects)
Author | C. L. Chang, R. R. Tamming, T. J. Broomhall, J. Janusonis, P. W. Fry, R. I. Tobey, and T. J. Hayward