Dresden 2020 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 77: Poster Session - 2D Materials: Stacking and Heterostructures
O 77.8: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/EG
Probing two-dimensional magnets with single spin magnetometer — •Qi-Chao Sun1, Tiancheng Song2, Rainer Stöhr1, Xiaodong Xu2, and Jörg Wrachtrup1,3 — 13. Physikalisches Institut, Universität Stuttgart, Stuttgart 70569, Germany — 2Department of Physics, University of Washington, Seattle, Washington 98195, USA — 3Max Planck Institute for Solid State Research, Stuttgart 70569, Germany
The two-dimensional (2D) magnets, which show novel phenomena due to the reduced dimensionality, open up opportunities to understand the magnetic properties in materials as well as design new spintronic devices. Here, we report our recent measurement on the atomically thin chromium trihalides materials by using a cryogenic scanning magnetometer based on a single nitrogen-vacancy (NV) center in a diamond tip. By quantitatively measuring the stray magnetic field of the material, we reconstructed the magnetization with a spatial resolution of ~80 nm, which is consistent with the previously reported value. Moreover, the scanning NV magnetometer is also capable of detecting the AC magnetic field generated by spin fluctuation and spin-wave, paving a new way of studying the 2D magnets.