Regensburg 2016 – scientific programme
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MA: Fachverband Magnetismus
MA 41: Magnetic Coupling Phenomena
MA 41.6: Talk
Thursday, March 10, 2016, 11:00–11:15, H33
Magnetic Property Modification of the Ferromagnet in Exchange Bias Systems by Low Energy Helium Ion Bombardment — •Henning Huckfeldt1, Dennis Nissen2, Manfred Albrecht2, and Arno Ehresmann1 — 1Institute for Physics and Center for Interdisciplinary Nanoscience and Technology (CINSaT), Kassel University, Heinrich-Plett-Str. 40, 34132 Kassel, Germany — 2Institute for Physics, Augsburg University, Universitätsstrasse 1 Nord, 86159 Augsburg, Germany
Using ion bombardment induced magnetic patterning (IBMP)[ 1] it becomes feasible to create magnetic structures that can be used in lab-on-a-chip devices, e.g. for fluid mixing.[ 2] During their preparation, exchange bias (EB) layer systems are locally exposed to 10 keV Helium ions while an external magnetic field saturates the sample. Due to the energy deposited into the material by the ions, magnetic domain patterns with arbitrary magnetization orientation and strength can be created.[ 1] Even though this technique has been used for about a decade, the link between energy input and the change in the magnetic properties is not fully understood.
Experimental studies will be presented, showing the influence of structural defects created by the penetrating ions on the exchange bias field direction and magnitude as well as on the saturation magnetization.
[1] D. Engel et al., J. Magn. Magn. Mat. 293 (2005) 849.
[2] D. Holzinger et al., J. Appl. Phys. 100 (2012) 153504.