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Durham University

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Publication details for Dr Aidan Hindmarch

King, J.A., Ganguly, A., Burn, D.M., Pal, S., Sallabank, E.A., Hase, T.P.A., Hindmarch, A.T., Barman, A. & Atkinson, D. (2014). Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation. Applied Physics Letters 104(24): 242410.

Author(s) from Durham

Abstract

The influence of interfacial intermixing on the picosecond magnetization dynamics of ferromagnetic/non-magnetic thin-film bilayers was studied. Low-dose focused-ion-beam irradiation was used to induce intermixing across the interface between a 10 nm Ni 81Fe19 layer and a 2–3 nm capping layer of either Au or Cr. Time-resolved magneto-optical Kerr effect was used to study magnetization dynamics as a function of ion-beam dose. With an Au cap, the damping of the un-irradiated bilayer was comparable with native Ni 81Fe19 and increased with increasing ion dose. In contrast, for Ni 81Fe19/Cr the damping was higher than that for native Ni 81Fe19, but the damping decreased with increasing dose.