SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Non-Skyrmionic Magnetic Textures I
MA 11.2: Vortrag
Montag, 27. März 2023, 15:15–15:30, POT 6
Domain structures of stressed free-hanging magnetic thin films — Dhavalkumar Mungpara1, •Alexander Schwarz1, Federico Maspero2, Riccardo Bertacco2, Nicola Manca3, Leonèlio Cichetto Jr.3, and Luca Pellegrino3 — 1INF, University of Hamburg, Jungiusstr. 11, 20355 Hamburg — 2CNR-IFN, Piazza Leonardo da Vinci 32, 20133 Milano, Italy — 3CNR-SPIN Corso F. M. Perrone 24, 16152 Genova, Italy
This work has been conducted as part of the OXiNEMS project, which aims to realize a miniaturized all-oxide hybrid sensor able to detect magnetic fields in the fT-regime. Our envisaged design encompasses a superconducting pick-up loop with a constriction and a magnetically sensitive resonator placed directly above.
To achieve a high sensitivity, the resonator must have a high Q-value, which is accomplished by a large in-plane stress. To obtain magnetic sensitivity, the resonator itself can be magnetic, or a magnetic thin film element is grown on top of a non-magnetic resonator. Of course, the magnetic sensitivity of the whole device depends on the magnetic properties of the resonator. Therefore, we investigated the domain structure of two promising resonator candidates using magnetic force microscopy: 100 nm thick Co rectangles on non-magnetic silicon nitride trampoline resonators and 100 nm thick magnetic La0.7Sr0.3MnO3 trampoline resonators.
The OXiNEMS project (www.oxinems.eu) has received funding from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 828784.