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.

• Publication type: Journal Article
• ISSN/ISBN: 0003-6951, 1077-3118
• DOI: 10.1063/1.4883860
• Keywords: Gold, Focused ion beam technology, Doping, Ferromagnetism, Ion beams.
• Further publication details on publisher web site
• Durham Research Online (DRO) - may include full text

Author(s) from Durham

• Professor Del Atkinson
• Dr Jennifer King
• Dr Aidan Hindmarch

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.