Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Poster Session I
MA 17.53: Poster
Dienstag, 8. März 2016, 09:30–12:30, Poster B1
Magnetic Properties of Layered Chromium Trihalides — •Nils Richter1,2, Franziska Racky1, Daniel Weber3, Clemens Wuth4, Bettina V. Lotsch3, and Mathias Kläui1,2 — 1Institut für Physik, Johannes Gutenberg-Universität Mainz — 2Graduate School of Excellence Materials Science in Mainz (MAINZ) — 3Max-Planck Institut für Festkörperforschung Nanochemistry Stuttgart — 4Institut für Angewandte Physik und Zentrum für Mikrostrukturforschung, Universität Hamburg
There is an ever-growing interest in two-dimensional materials to facilitate further size-reduction and enhanced efficiency in microelectronics [1]. Especially magnetic properties of such materials are important for spintronic and magnetoelectronic applications [2]. The class of chromium trihalides, CrX3 (X = Cl, Br, I), are van der Waals bonded, layered semiconductors and show (anti-)ferromagnetism [3]. We examine the magnetic properties of large crystallites of these compounds using a superconducting quantum interference device (SQUID). Furthermore we are able to exfoliate all of them with thicknesses down to a few layers. We test these ultra-thin systems of just a few layers, whether their magnetism persists on this scale by probing their magnetic stray field with ballistic Hall-sensors made of high-mobility GaAs/AlGaAs 2DEGs[4].
[1] Lemme, M. C. et al., F. MRS Bull. 39 (2014). [2] Felser, C. et al., Angew. Chem., Int. Ed. 46 (2007). [3] Wang, H. et al., J. Phys. Condens. Matter 23 (2011). [4] A. K. Geim et al., Appl. Phys. Lett. 71 (1997).