SKM 2023 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 6: Poster

KFM 6.36: Poster

Dienstag, 28. März 2023, 17:00–19:00, P3

Low Temperature combined Confocal/AFM microscope for photo-luminescence and magnetic resonance experiments — •Elizaveta Starykh, Michael Dotan, and Boris Naydenov — Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany

Measuring small magnetic fields emanating from spins or magnetic nanoparticles, both with high spectral resolution and under diverse conditions has always been an ambitious task. Nanoscale magnetic imaging using nitrogen-vacancy (NV) colour centres in diamond has been proven to be a reliable method due to their unique properties and ability to be effectively manipulated by external magnetic fields. With laser light, it is possible to both initialize and read out the NV spin state, thereby non-destructively determining the magnetic profile of the sample.

With recent developments in technology, it is now possible to fabricate single NVs on the tip of an AFM cantilever and measure a magnetic field map from a sample. Due to the NVs' high sensitivity and susceptibility to the external environment, precise control of many parameters must be observed.

To combine different techniques to perform such complex experiments, we built a confocal setup on top of a attoCUBE closed-cycle cryogenic system. With optical access at the top, microwave and radio frequency control, AFM cantilever and separate temperature control for magnets and sample volume, we can now access a wide range of physical properties of solid-state materials.