Regensburg 2004 – scientific programme
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MA: Magnetismus
MA 14: Hauptvortr
äge Eisenmenger / Münzenberg
MA 14.1: Invited Talk
Wednesday, March 10, 2004, 14:00–14:30, H10
Exchange Biased Nanostructures — •J. Eisenmenger1,2, Zhipan Li1, O. Petracic1, I. V. Roshchin1, Kai Liu3, J. Nogués4, C. Leighton5, H. Masuda6, K. Nishio6, and Ivan K. Schuller1 — 1Department of Physics, University of California, San Diego — 2Abteilung Festkörperphysik, Universität Ulm, — 3Department of Physics, University of California, Davis — 4ICREA and Departament de Física, Universitat Autònoma de Barcelona, Bellaterra — 5Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis — 6Applied Chemistry Department, Tokyo Metropolitan University, Hachioji
Magnetic nanostructures are receiving increasing attention in recent years, motivated by the interesting physical phenomena present and the potential for applications in the sensor and storage industries. Magnetic nanostructures become particularly interesting when they are in contact with other dissimilar magnetic materials, e.g. ferromagnetic nanostructures which are in contact with an antiferromagnetic substrate. In such exchange biased configurations, a variety of interesting phenomena arise; the reversal mode of the ferromagnet changes considerably, there is a noticeable change in the domain structure and the magnetization can be stabilized by the additional anisotropy which is an important aspect for small magnetic particles where thermal fluctuation can easily cause superparamagnetic behavior. In a series of experiments we studied these phenomena in nanostructured Fe/FeF2 bilayers patterned by electron beam lithography and self assembly. Work supported by AvH Foundation, AFOSR, DOE, NSF, and Cal(IT)2.