Design and experiment of room temperature ferromagnetic resonance

One of the interests in quantum information processing is hybrid systems that utilize various kinds of quantum systems. Among the options of hybrid systems, magnon-photon coupling through ferromagnetic resonance is an option that is studied. Ferromagnets have internal magnetic moment that will align and precess with the direction of the external magnetic field. Ferromagnetic resonance (FMR) occurs when RF transverse field at same frequency as the precession frequency gets absorbed to the ferromagnet. This project focuses on building from scratch basic FMR experiment at room temperature. Four different ferromagnetic samples were placed on a custom designed coplanar waveguide (CPW) to be tested at different angles of alignment with respect to static magnetic field inside 76 mm electromagnet and measured. Measurements taken at room temperature indicated that all four samples showed the expected behavior of resonant frequency dependent on the static magnetic field. Lastly, as the project evolves into a low temperature experiment in cryostat, superconducting resonators that are planned for future FMR experiments was simulated to look at strength of RF transverse field. It was found that the field strength was greatest when the center trace of the CPW was thinnest and did not vary with characteristic impedance at the surface of the CPW. This behavior becomes more complex as we look at field strength further away from the surface of the CPW center trace.Electrical and Computer Engineerin