Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 29: Micro- and Nanostructured Magnetic Materials II
MA 29.3: Vortrag
Mittwoch, 16. März 2011, 11:30–11:45, HSZ 103
Magnetic behaviour of embedded antiferromagnetic elements in remanence — •Roland Neb1, Peter Andreas Beck1, Thomas Sebastian1, Philipp Pirro1, Stefan Pofahl2, Rudolf Schäfer2, Bernhard Reuscher3, and Burkard Hillebrands1 — 1Fachbereich Physik and Forschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 3Institut für Oberflächen- und Schichtanalytik, IFOS, Trippstadter Straße 120, 67663 Kaiserslautern, Germany
We investigate small elements with ferromagnetic interlayer coupling in an antiferromagnetically coupled environment. These elements are created by focused ion beam irradiation on an antiferromagnetically coupled Fe/Cr/Fe-trilayer. We show that the behavior of these elements is dominated by rectangular edge domains of a constant size, independently of the size of the surrounding square. These domains impose a lower limit for the size of the elements, beyond which the antiferromagnetic coupling vanishes completely. A symmetry breaking is observed by finding the edge domains only on two of the four sides. Different thicknesses of the magnetic layers do not alter the properties of the domains, giving rise to the assumption that this is not an anisotropy effect, but only due to exchange coupling.