SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Posters Magnetism I
MA 3.16: Poster
Montag, 27. September 2021, 13:30–16:30, P
Complex nanostructured magnetic thin films investigated by x-ray absorption spectroscopy — •Damian Günzing1, Shalini Sharma2,3, Alexander Zintler3, Johanna Lill1, Debora Motta Meira4, Harish K Singh3, Ruiwen Xie3, Georgia Gkouzia3, Márton Major3, Iliya Radulov3, Philipp Komissinskiy3, Hongbin Zhang3, Konstantin Skokov3, Yukiko K Takahashi2, Lambert Alff3, Leopoldo Molina-Luna3, Heiko Wende1, and Katharina Ollefs1 — 1Faculty of Physics, University of Duisburg-Essen — 2National Institute for Materials Science, Tsukuba — 3Institute of Materials Science, Technical University of Darmstadt — 4Sector 20, Advanced Photon Source, Argonne National Laboratory
Understanding the interplay of the structural phase composition and the corresponding magnetic properties is at the heart of hysteresis design of e.g. hard magnetic materials. Here, we investigated a SmCo5 Sm2Co17 nano composite film manufactured via MBE on an Al2O3 substrate without additional buffer layers [1]. We established a multi-absorber fitting and simulation method for non-destructive extended x-ray fine structure (EXAFS) spectra of complex magnetic materials to quantify the two phases, SmCo5 and Sm2Co17. In combination with transmission electron microscopy and magnetometry we found that the high magnetization and strong perpendicular anistropy originates from the nanoscale composition of these two phases with coherent interfaces. (Supported by the DFG Project-ID 405553726*CRC 270).
[1] S. Sharma et al., ACS Appl. Mater. Interfaces (2021) 13, 27, 32415-32423