SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 32: Magnetic Imaging Techniques I
MA 32.1: Vortrag
Mittwoch, 29. März 2023, 15:00–15:15, HSZ 401
Correlating Magnetic Force Microscopy imaging with bulk Magnetometry for ferroelastic Fe7S8 inspection — •Samuel Seddon1, Peter Milde1, Marin Alexe2, Charles Haines3, Michael Carpenter3, and Lukas Eng1,4 — 1TU Dresden, Institute of Applied Physics, Noethnitzer Straße 61, 01187 Dresden, Germany — 2University of Warwick, Coventry, CV4 7AL, England — 3Universtiy of Cambridge, Cambridge, CB3 0WA, England — 4ct.qmat: Dresden-Wuerzburg Cluster of Excellence-EXC 2147, TU Dresden, 01062 Dresden
Pyrrhotite, Fe7S8, is a natural mineral exhibiting a strong magnetoelastic coupling - which is to say that the material's ferroelastic domains directly determine the allowed directions of its magnetic moments. This system provides an interesting environment to explore the role that a material's crystal structure has on its magnetic properties, on a unit-cellular level. Here, magnetic force microcopy (MFM) is used to directly correlate local magnetic switching behaviors with various features observed from the bulk magnetic hysteresis; a magnetic hysteresis as acquired from MFM field dependent measurements is visualized. Local magnetic domains thus can be directly correlated to the expected ferroelastic domain wall pinning, as well as to domains that are responsible for the differences observed in saturation magnetization. Preliminary results pertaining to the application of mechanical strain will also be presented.