Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 22: Poster II
DF 22.32: Poster
Freitag, 15. März 2013, 10:30–13:30, Poster D
Artificial spin-ice systems prepared by focused electron beam induced deposition. — •Evgeniya Begun, Fabrizio Porrati, and Michael Huth — Physikalisches Institut, Goethe-Universität, D-60438 Frankfurt am Main, Germany
Spin-ice systems are interesting for the study of fundamental aspects of magnetic monopoles, as well as for magnetic information processing. Besides of the rather narrow class of materials with ice-type magnetic disorder, there exists the possibility of artificial spin-ice creation. Here we present first results on the preparation of cobalt-based artificial spin-ice structures of different configurations grown by focused electron beam induced deposition (FEBID) using the precursor dicobaltoctacarbonyl Co2(CO)8. The obtained spin-ice structures are in the form of two-dimensional regular arrays of elongated magnetic cobalt islands, which have a metal content of about 70-85 at.%. For the optimization of a one-domain state in each individual Co element the length (from 100 to 500 nm), the width (from 30 to 50 nm), the thickness (from 25 to 50 nm) and the lattice constant (from 200 to 400 nm) have been varied. The arrays have been grown to cover areas from 1 to 10 µm2 in order to exclude edge effects. First results of magnetic force microscopy measurements done at room-temperature are presented.