Leiden University Student Repository

Ruigrok, Jesse (2024)

Investigating the Spin Dynamics of Spin-Triplet Cooper Pairs

Bachelor thesis | Natuurkunde (BSc)

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 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.

Superconductivity

Spintronics

Triplet superconductivity

Ferromagnetic Resonance

VNA-FMR

Coplanar Waveguide

RF frequency

Author

Ruigrok, Jesse

Faculty

Faculty of Science

Supervisors

Lahabi, K.
Aarts, J.

ECTS Credits

24

Language

en