Contributed Talk - Thursday, 16 September I 10:00 AM (CEST)
Prof. Dr. Christian Teichert: "Semi-quantitative Magnetic Force Microscopy investigation of iron-rich phyllosilicates in the monolayer limit"
A. Matković1, L. Ludescher1, O. E. Peil2, A. Sharma3, K.-P. Gradwohl1, M. Kratzer1, L. Romaner2, D. R. T. Zahn3, G. Salvan3, J. G. Raith4, C. Teichert1
1 Institute of Physics, Montanuniversität Leoben, Franz Josef Strasse 18, 8700 Leoben, Austria
2 Materials Center Leoben Forschung GmbH (MCL), Roseggerstrasse 12, 8700 Leoben, Austria
3 Semiconductor Physics, Chemnitz University of Technology, Reichenhainer Strasse 70, D-09107 Chemnitz, Germany.
4 Chair of Resource Mineralogy, Montanuniversität Leoben, Peter-Tunner-Strasse 5, 8700 Leoben, Austria
Layered silicate minerals, so-called phyllosilicates, were recently proposed as naturally occurring sources of 2D van der Waals (vdW) materials . By mechanical exfoliation from a mineral agglomerate containing also magnetite and hematite, we were able to prepare on silicon oxide/silicon substrates mono- and few-layer flakes of talc where about 13 % of magnesium where replaced by iron from the surrounding. By executing magnetic force microscopy measurements in external out-of-plane magnetic fields up to 0.5 T, we were able to semi-quantitatively measure the magnetic response of these materials in dependence of the applied fields and the lift height down to the monolayer limit.
 R. Frisenda, et al. "Naturally occurring van der Waals materials." npj 2D Materials and Applications 4 (2020) 1-13.