Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 41: Micro- and Nanostructured Magnetic Materials
MA 41.4: Talk
Friday, September 9, 2022, 12:15–12:30, H47
Magnetic properties of cobalt - nanomagnets: towards spin qubit control — •Liza Zaper1,2, Peter Rickhaus2, Alexander Stark2, Floris Braakman1, and Martino Poggio1 — 1University of Basel, Basel, Switzerland — 2Qnami AG, Muttenz, Switzerland
A promising platform to realise quantum computation uses the spin states of confined electrons to define the qubit. In order to achieve reliable control and high integration of spin qubit devices on a chip, we aim to pattern nanometer-scale magnets that have large magnetic field gradients at the position of the confined electron. We fabricate highly magnetic cobalt nanostructures using focused-electron-beam-induced deposition. We characterize the magnetization properties of the nanomagnets by NV scanning microscopy, as well as magnetotransport. The scanning probe images indicate the structure of the magnetic domains and the profile of the magnetic stray fields, which can be further used as a guideline for qubit device optimisation.