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Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 6: Magnetic Instrumentation and Characterization

MA 6.2: Vortrag

Montag, 20. März 2017, 09:45–10:00, HSZ 403

Investigation of the domain sizes in Co/Pd multilayers via soft x-ray resonant magnetic scatteringKai Bagschik1,2, •Ralph Buß1,2, Robert Frömter1,2, Judith Bach1, Björn Beyersdorff1, Leonard Müller3, Stefan Schleitzer3, Magnus Hårdensson Berntsen3,4, Christian Weier5, Roman Adam5, Jens Viefhaus3, Claus Michael Schneider5, Gerhard Grübel2,3, and Hans Peter Oepen1,21Institut für Nanostruktur- und Festkörperphysik, Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Hamburg, Germany — 3DESY, Hamburg, Germany — 4KTH Royal Institute of Technology, Kista, Sweden — 5Peter Grünberg Institut, Jülich, Germany

We present results of a magnetic SAXS experiment on a wedge-shaped (Co0−10Å/Pd10Å)8 multilayer film in the multidomain state. The diffraction patterns show isotropic rings which result from strongly disordered magnetic domain patterns. To describe the scattering pattern, a model has been developed based on a one-dimensional domain pattern with gamma-distributed domain sizes [1].

Structure factors generated from the model are fitted to the experimental data with very good agreement. The analysis reveals average domain sizes (depending on Co-thickness) that significantly deviate from the value commonly extracted from the peak position of the structure factor. The structure factor is described by the same shape parameter of the gamma distribution independent on the mean domain size.

[1] K. Bagschik, et al., Phys. Rev. B 94, 134413 (2016).

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