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Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

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MA: Fachverband Magnetismus

MA 19: Characterization and Instrumentation

MA 19.4: Talk

Monday, March 16, 2020, 18:00–18:15, HSZ 101

Scanning thermal gradient microscopy as a tool to read and write domains in non-collinear antiferromagnets — •Helena Reichlova1, Tomas Janda2, Joao Godinho3, Anastasios Markou4, Dominik Kriegner4, Richard Schlitz1, Jakub Zelezny3, Zbynek Soban3, Mauricio Bejarano5, Helmut Schultheiss5, Petr Nemec2, Tomas Jungwirth3, Claudia Felser1, Joerg Wunderlich3, and Sebastian T.B. Goennenwein11Institut für Festkörper- und Materialphysik and Würzburg-Dresden Cluster of Excellence ct.qmat, TU Dresden — 2Faculty of Mathematics and Physics, Charles University in Prague — 3Institute of Physics, Academy of Science of the Czech Republic — 4Max Planck Institute for Chemical Physics of Solids — 5Institute of Ion Beam Physics and Materials Research, HZDR

We present scanning thermal gradient microscopy as a tool to visualize magnetic structure in a non-collinear antiferromagnet Mn3Sn thin films [1]. The technique is based on a laser induced thermal gradient which is scanned over the sample surface. The out-of-plane thermal gradient generates an in-plane thermo-voltage via the anomalous Nernst effect, which depends on the domain orientation and therefore yields magnetic spatial contrast. We further show that a domain pattern can be modified via heat assisted writing. Our work opens a route not only to image domains in non-collinear antiferromagnets but also to prepare well-defined domain configurations. [1] Reichlova, et al., Nat. Comm. 10, 5459 (2019)

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