Dresden 2020 – scientific programme

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MA: Fachverband Magnetismus

MA 57: Posters Magnetism II

MA 57.35: Poster

Thursday, March 19, 2020, 15:00–18:00, P3

Quantitative Magnetic Force Microscopy of Magnetic Storage Media and its Avail to Probe Calibration — •Johannes Fendt¹, Jan Gurzynski¹, Siming Zou¹, Runbang Shao², and Berndt Koslowski¹ — ¹Institut für Festkörperphysik, Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany — ²Institut für Funktionelle Nanosysteme, Universität Ulm, Albert-Einstein-Allee 47, D-89081 Ulm, Germany

One-dimensional periodic magnetic structures are interesting for magnetic force microscopy (MFM) because they can be used to calibrate the probes. The simplest of such structures is the Kittel domain structure, for which the magnetisation in the sample is alternating and perpendicular to the surface. It is established that the stray field of such a structure decays exponentially with distance and the decay length is z₀ = P /2 π with period P. In accord with former objections, we demonstrate that the decay length shows significant deviations from the expectations. Additionally, we show how such structures can be exploited to calibrate MFM probes within the pseudo-pole model of MFM-tips.