Dresden 2011 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)
MA 19.32: Poster
Dienstag, 15. März 2011, 10:45–13:00, P2
Néel walls in magnetic hybrid structures — Mohammed Abdul Basith1, Stephen McVitie1, •Thomas Strache2, Monika Fritzsche2, Arndt Mücklich2, Jeffrey McCord2, and Jürgen Fassbender2 — 1Department of Physics and Astronomy, University of Glasgow, G12 8QQ, United Kingdom — 2Institut für Ionenstrahlphysik und Materialforschung, Helmholtz-Zentrum Dresden - Rossendorf, PF 510119, 01314 Dresden, Germany
Néel walls in soft magnetic NiFe/NiFeGa hybrid stripe structures surrounded by a NiFe film are studied by Lorentz microscopy. Upon downscaling the stripe structure size from 1000 nm to 200 nm a transition from a discrete domain pattern to an effective magnetic medium is observed for external magnetic field reversal experiments. This transition is associated with a vanishing abilitity of hosting neighboring high angle domain walls between adjacent stripes for stripes widths smaller than 500 nm. Furthermore domain walls constricted inside the stripes are characterized concerning the connection between domain wall witdh and domain wall angle. These results are compared with unconstricted domain walls in the surrounding film, theoretical predictions and with micromagnetic simulations.