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MA: Fachverband Magnetismus
MA 7: Magnetic Relaxation and Gilbert Damping
MA 7.1: Vortrag
Montag, 5. September 2022, 11:00–11:15, H43
Strong photon-magnon-coupling between superconducting niobium lumped-element-resonators and micron sized magnets — •Philipp Geyer1, Philip Trempler1, Karl Heimrich1, and Georg Schmidt1,2 — 11Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle (Saale), Germany — 22Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum Weinberg, 06120 Halle (Saale), Germany
Since quantum computing plays a more and more important role in information technology hybrid quantum magnonics emerge as a promising research field. Here, the coupling between different quantum states like microwave photons and magnons at cryonic temperatures is in focus [1]. We investigate the coupling between superconducting niobium Lumped-Element-Resonators and thin micron-sized magnetic structures. Therefore, we use the magnetic material permalloy and yttrium-iron-garnet (YIG). Permalloy was structured by optical lithography and grown by argon-ion sputtering at room-temperature. YIG was grown as free standing structure [2] or commercial LPE film and further processed and placed on the cavity by focused-ion-beam technique. We detect strong coupling as avoided crossing in the transmission related S-Parameter measured by a vector-network-analyzer. For validation of our experimental results, we perform electromagnetic simulations with CST Studio Suite and micromagnetic simulations with MuMax3. [1] H. Huebl et.Al. Phys. Rev. Lett. 111, 127003 (2013) [2] P. Trempler et. Al. Appl. Phys. Lett. 117, 232401 (2020) 401 (2020)