Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.20: Poster
Friday, March 20, 2020, 09:00–12:00, P2/EG
Fast Mapping of Magnetic States in Perpendicular Magnetic Anisotropy Systems — •Ruslan Salikhov1, Fabian Samad1, Leopold Koch2, Benny Böhm2, and Olav Hellwig1,2 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Chemnitz University of Technology, Chemnitz, Germany
Synthetic antiferromagnets (SAF) with perpendicular magnetic anisotropy (PMA) are hosting a large variety of magnetic states ranging from AF coupled states to ferromagnetic (FM) stripe domain configurations and their mixtures [1]. Magnetic states in SAFs can be conveniently adjusted using the design parameters of the magnetic multilayers (ML), e.g. their individual layer thicknesses and their number of repetitions [1]. The remanent domain state mostly depends on the specific demagnetization routine via an external magnetic field [1-3]. Here we present the fast mapping of magnetic states in SAFs for different demagnetization protocols and ML parameters by means of monitoring the remanent magnetization (RM) during the AC or DC demagnetization process itself and performing magnetic force microscopy (MFM) imaging at intermediate specific states of interest. The aligned stripe domain state is characterized by almost zero RM, whereas bubble domains manifest themselves by an enhanced RM. Our screening protocol allows the fast and convenient detection of magnetic bubble states in all type of PMA systems including SAFs. [1] O. Hellwig, et al., JMMM 319, 13-55 (2007). [2] K. Chesnel, et al., Phys. Rev. B 98, 224404 (2018). [3] L. Fallarino, et al., Phys. Rev. B 99, 024431 (2019).