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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.45: Poster
Donnerstag, 19. März 2020, 15:00–18:00, P3
EPR on-a-Chip for Operando XES Experiments — •Ekaterina Shabratova1, Silvio Künstner1, Raul Garcia-Diez2, René Grüneberger2, Matthias Neeb2, Katja Höflich2, Volker Niemann3, Rainer Pietig3, Boris Naydenov1, Jens Anders4, and Klaus Lips1 — 1Berlin Joint EPR Laboratory, Helmholtz-Zentrum Berlin — 2Helmholtz-Zentrum Berlin — 3Bruker BioSpin GmbH — 4Institute of Smart Sensors, Universität Stuttgart
Electron Paramagnetic Resonance (EPR) has proven to be an effective quantitative technique to study paramagnetic materials. Despite many advantages of this method, it still has some limitations. In particular, there are restrictions to the sample’s environment due to usage of resonators, so operando experiments are hard to perform and the microwave frequency cannot be swept. The new EPR-on-a-Chip (EPRoC) technique allows to eliminate these limitations by using Voltage Controlled Oscillators (VCO). The sample is placed on the coil of a VCO, causing a change of its oscillation frequency that is detected as the EPR signal. EPRoC allows frequency sweeps, so a permanent magnet can be used as a source of the static magnetic field B0. Moreover, EPRoC, being in size around 1 mm2, can be integrated into the sample environment thus allowing operando investigations of different processes. Here, we will discuss the EPRoC setup and how it is planned to be implemented in the ambient pressure X-ray emission spectroscopy cell at the BESSY II synchrotron beamline. We present first steps towards this goal, and focus on the development of an electro- and permanent magnet with homogeneous magnetic field.