Dresden 2011 – scientific programme

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MA: Fachverband Magnetismus

MA 32: Magnetic Thin Films I

MA 32.3: Talk

Wednesday, March 16, 2011, 11:30–11:45, HSZ 04

FIB induced structural modifications in thin magnetic films — •Olga Roshchupkina, Jörg Grenzer, Thomas Strache, Monika Fritzsche, Arndt Mücklich, and Jürgen Fassbender — Helmholtz-Zentrum Dresden-Rossendorf

Focused ion beam irradiation is a versatile tool that can be used for magnetic nanostructuring. In this work we compare both FIB irradiation and a standard implantation taking into account their distinctive irradiation features. A 50nm thick permalloy layer (Ni₈₀Fe₂₀) irradiated with different Ga⁺ ion fluences was used for the investigations. The structure was studied via XRD and EXAFS measurements carried out on the ESRF ROBL and ID01 facilities. Additionally TEM and magneto-optic Kerr effect magnetometry were performed. Both types of irradiation demonstrate a similar behaviour: increasing the ion fluence causes a further material crystallization and a decrease of the magnetic moment. However FIB irradiation leads to a stronger crystallite growth due to the high current densities used.