Berlin 2005 – scientific programme

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MA: Magnetismus

MA 28: Magnetische Partikel/Cluster I

MA 28.5: Talk

Tuesday, March 8, 2005, 16:15–16:30, TU H1028

Mass filtered magnetic FeCo clusters — •Furkan Bulut¹, Renate Kerstin Gebhardt¹, Joachim Bansmann², Armin Kleibert², Ralf Methling², Karl-Heinz Meiwes-Broer², and Mathias Getzlaff¹ — ¹Institut für Angewandte Physik, Uni Düsseldorf — ²Fachbereich Physik, Uni Rostock

FeCo is a binary alloy with a large magnetic moment. Therefore FeCo clusters are promising candidates for thin film magnetic storage devices. Such clusters are produced by means of a continuously working arc cluster ion source (ACIS). A subsequent electrostatic quadrupole acts as mass filtering element of the alloy clusters. Typical diameters are between 6 and 12 nm. The clusters are deposited on ferromagnetic Ni/W(110)-surfaces under UHV conditions. AFM measurements prove that the height of the clusters is less than the diameter of free particles that is probably caused by particle-support interactions. Element specific magnetic studies were performed by means of X-ray magnetic circular dichroism (XMCD) at BESSY. We will also discuss saturation effects which have to be taken into account when applying sum rules for spin and orbital moment calculations.