On the hunt for spin triplet superconductivity in ferromagnet-superconductor multilayers, additions were made to an RF insert with an open co-planar waveguide. The low loss setup, with a -1dB per...Show moreOn the hunt for spin triplet superconductivity in ferromagnet-superconductor multilayers, additions were made to an RF insert with an open co-planar waveguide. The low loss setup, with a -1dB per GHz characteristic, was used to obtain FMR spectra with a vector network analyzer. A superconducting coil was designed to generate magnetic fields in situ at cryogenic temperatures. Many cobalt-niobium thin film multilayers were created by means of e-beam evaporation. The FMR spectra were recorded at room temperature and cryogenic temperatures as low as 4.5K. The spectra were analyzed to determine the linewidth of the FMR resonance above and below the critical temperature of different thicknesses of the superconducting layer. The initial results are promising, but not sufficient to conclude decreased gilbert damping in the ferromagnet below the Tc of the superconductor.Show less
In an effort to control triplet superconductivity in ferromagnetic disks with RF signals a setup was built to support high frequency experiments in a vector magnet cryostat. This setup included the...Show moreIn an effort to control triplet superconductivity in ferromagnetic disks with RF signals a setup was built to support high frequency experiments in a vector magnet cryostat. This setup included the fabrication of on-substrate coplanar waveguides which can be used to couple RF signals to existing devices by fabricating the devices on top of the waveguide. Another component is the addition of a shielding box which can both block low frequency resonances and can make connecting to the on-substrate waveguides more convenient and reliable. To test the setup, ferromagnetic resonance experiments were done on permalloy thin films using a vector network analyser in addition to the vector magnet.Show less
