Regensburg 2007 – scientific programme

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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.90: Poster

Tuesday, March 27, 2007, 15:00–19:00, Poster A

Magnetic domain structures in [Co/Pt]/Ru multilayers studied by MFM in magnetic field — •Cristina Bran^1,2, Ulrike Wolff¹, Ludwig Schultz¹, and Volker Neu¹ — ¹IFW Dresden, Institute for Metallic Materials, P.O. Box 270116, D-01171 Dresden, Germany — ²IMPRS "Dynamical Processes in Atoms, Molecules and Solids", Nöthnitzer Str. 38, Dresden, Germany

The detailed study of the magnetization process is important for the understanding of the coupling mechanism of the recently developed AF-coupled [Co/Pt]/Ru multilayers [1]. The field-dependent domain structure of a [(Co(4Å)/Pt(7Å))₈/Ru(9Å)]₁₈ multilayers was investigated by magnetic force microscopy (MFM). Measurements were performed using a DI Dimension 3100, upgraded for measurements with an external magnetic field applied perpendicular to the sample. In the zero field state, band domains with average domain width of 300 nm are observed. Upon increasing the external magnetic field, the domains first modify gradually, without changing the general configuration, until they transform into a bubble domain structures at 0.4 T, which is about 80% of the saturation field of the sample. An analysis of individual field dependent line scans represents the first attempt towards finding a quantitative correlation between domain structure and net magnetization. [1]O. Hellwig et al, Nature Materials, vol. 2, pp. 112-116, 2003