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Dr Matthew Bryan

Research Fellow

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My work involves investigating the properties of magnetic structures with dimensions on the micro- or nanoscale using a combination of experimental techniques and computational modelling.  Using this dual approach, I have investigated the fundamental physics of magnetic domain walls and vortices.  Highlights include the first demonstrations that stress gradients can drive domain wall motion [M.T. Bryan, et al., Phys. Rev. B, 85, 144411 (2012); J. Dean, M.T. Bryan et al., J. Appl. Phys. 109, 023915 (2011)] and the discovery of a new mechanism of vortex core reversal via a Bloch core in systems containing competing anisotropies [P. Wohlhuenter, M.T. Bryan et al., Nature Commun. 6, 7836 (2015)].

As well as studying magnetization processes within a structure, I am also interested in magnetic behaviour as part of a system.  This has particular applications for the biosciences, where magnetic elements can be used to align cells [M.T. Bryan et al., IEEE Magn. Lett. 1, 1500104 (2010)] or to stimulate biological responses [N. Bowden, M.T. Bryan et al., Antioxid. Redox Signal. 25, 389 (2016)].  In Exeter, I am investigating how magnetic elements can be used to create robots that can perform programmable actions, such as swimming in a low-Reynolds number environment [M.T. Bryan, et al., J. Appl. Phys. 121, 073901 (2017); J.K. Hamilton, et al., Sci. Rep. 7, 44142 (2017)].
 

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