Berlin 2008 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 5: Magnetic Nanostructures
O 5.6: Vortrag
Montag, 25. Februar 2008, 12:30–12:45, MA 043
Magneto-optical study of hexagonal hole arrays in thin magnetic films — •Georgios Ctistis1, Evangelos Papaioannou2, Piotr Patoka1, Paul Fumagalli2, and Michael Giersig1 — 1Nanoparticle Technology Department, Center of Advanced European Studies and Research, 53175 Bonn, Germany — 2Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany
Nanostructured surfaces of optically thin films exhibit interesting optical properties as plasmon assisted transmission and are thus interesting for opto-electronic applications. Using magnetic materials such as Fe or Co instead, could result in tailoring the magnetic properties of the materials at desired frequencies.
In this study we present our magneto-optical studies of hexagonal nano-hole arrays of 100 nm thick magnetic films (Fe, Co, Ni). Different meshes were used with hole diameters ranging between 220 nm and 330 nm, while the inter-hole distance was kept constant at 470 nm, respectively. Spectra were taken with a Kerr-spectrometer in the range of 0.8 - 5 eV. A strong change in the response depending on the hole geometry compared to the corresponding closed films is observed. Furthermore, recorded hysteresis loops reveal the magnetization process as a function of the underlying geometry.