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Local control of magnetic damping in ferromagnetic/non-magnetic bilayers by interfacial intermixing induced by focused ion-beam irradiation
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King, J. A., Ganguly, A., Burn, D. M., Pal, S., Sallabank, E. A., Hase, Thomas P. A., Hindmarch, A. T., Barman, A. and 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, Volume 104 (Number 24). Article number 242410. doi:10.1063/1.4883860 ISSN 0003-6951.
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Official URL: http://dx.doi.org/10.1063/1.4883860
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.
Item Type: | Journal Article | ||||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Journal or Publication Title: | Applied Physics Letters | ||||||||||
Publisher: | American Institute of Physics | ||||||||||
ISSN: | 0003-6951 | ||||||||||
Official Date: | June 2014 | ||||||||||
Dates: |
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Volume: | Volume 104 | ||||||||||
Number: | Number 24 | ||||||||||
Article Number: | Article number 242410 | ||||||||||
DOI: | 10.1063/1.4883860 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access |
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