Regensburg 2019 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 48: Two-dimensional Materials IV (joint session HL/CPP)
HL 48.4: Vortrag
Freitag, 5. April 2019, 10:15–10:30, H36
Magnetic Anisotropic Behavior in Two-Dimensional Layered Cr2Ge2Te6 Crystals — •Sebastian Selter1,2, Gaël Bastien1, Anja U. B. Wolter1, Saicharan Aswartham1, and Bernd Büchner1,2 — 1IFW Dresden, Dresden, Germany — 2TU Dresden, Dresden, Germany
Cr2Ge2Te6 is one of the few known examples of two-dimensional layered ferromagnetic insulators. Ferromagnetic order was observed down to the bilayer, while theoretical calculations even suggest stable ferromagnetic order on the monolayer. This finding makes this compound interesting in terms of both fundamental understanding as well as for novel spintronic applications.
Thus, to entangle the physics behind possible monolayer ferromagnetism it is essential to understand the bulk magnetism which will enable us for the future applications.
Here, we present a comprehensive synthesis, magnetic and thermodynamic investigation on Cr2Ge2Te6. Bulk Cr2Ge2Te6 becomes ferromagnetic below 64 K with the magnetic easy axis parallel to the crystallographic c-axis. A magnetic anomaly has been observed for low external fields applied perpendicular to the easy axis. An investigation of the field dependency of this anomaly hints towards a field driven nature.