SKM 2021 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 18: Posters Magnetism V
MA 18.41: Poster
Freitag, 1. Oktober 2021, 10:00–13:00, P
Mapping the Stray Fields of a Micromagnet Using Spin Centers in SiC — •Mauricio Bejarano1,2, Francisco Jose Trindade Goncalves1, Michael Hollenbach1,2, Toni Hache1,3, Tobias Hula1,3, Yonder Berencén1, Jürgen Fassbender1, Manfred Helm1, Georgy V. Astakhov1, and Helmut Schultheiss1 — 1Helmholtz-Zentrum Dresden-Rossendorf, 01328 Dresden, Germany — 2Technische Universität Dresden, 01062 Dresden, Germany — 3Technische Universität Chemnitz, 09107 Chemnitz, Germany
We report on utilizing an ensemble of VSi centers as a room-temperature sensor of static stray fields generated by magnetic microstructures patterned on top of a SiC substrate. We use optically-detected magnetic resonance (ODMR) to measure the impact of the stray fields on the intrinsic VSi resonance frequencies. The spin resonance at the spin centers is driven by a micrometer-sized microwave antenna patterned next to the magnetic element. The antenna pattern is made to ensure that the driving microwave fields are delivered locally and more efficiently compared to conventional millimeter-sized circuits. We observe a spatially dependent frequency shift of the VSi resonances which enables us to determine the field contribution from the magnetic element in its close vicinity. Our results are a first step toward developing magnon-quantum applications by deploying local microwave fields and stray fields at the micrometer length scale. This work was supported in part by the German Research Foundation under Grants SCHU 2922/4-1 and AS 310/5-1.