Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 29: Micro- and Nanostructured Magnetic Materials
MA 29.7: Vortrag
Mittwoch, 13. März 2013, 16:45–17:00, H23
Simultaneous measurement of AMR and observation of magnetic domains — Julia Osten1,2, •Manuel Langer1,2, Kilian Lenz1, Jürgen Lindner1, and Jürgen Fassbender1,2 — 1HZDR Institute of Ion-Beam Physics and Materials Research P.O. Box 510119, 01314 Dresden, Germany — 2TU Dresden Helmholtzstr. 10, 01069 Dresden, Germany
Anisotropic magneto resistance (AMR) sensors are widely used in daily life. Nevertheless, the influence of magnetic domains on the AMR is still not fully understood. AMR depends on the angle between applied current and the direction of the internal magnetization, which is equal to the sum of all magnetic domains. For the understanding of the AMR it is important to know the domain structure.
In this experiment Kerr microscopy is used for the observation of the magnetic domains while at the same time the AMR is measured. The investigated permalloy films are stripe patterned by Cr+ implantation. Amongst other effects the implantation leads to a lower saturation magnetization in the implanted stripes compared to the non-implanted ones.
Our measurements show a clear correlation between AMR and the magnetic domain structure. It is also possible to correlate stripe parameters to different domain types.
This work is supported by DFG grant FA316/3-2.