One of the largest challenges in creating spin-driven electronic devices is manipulating the spin texture of a sample using a current, rather than a magnetic field. La0.7Sr0.3MnO3 (LSMO) nanowires...Show moreOne of the largest challenges in creating spin-driven electronic devices is manipulating the spin texture of a sample using a current, rather than a magnetic field. La0.7Sr0.3MnO3 (LSMO) nanowires are of particular interest for creating such devices, because they allow for the creation of currents carrying a net spin due to the spin-polarised nature of LSMO. If two regions of opposite magnetisation, separated by a domain wall, are created in such a nanowire, it should be possible to move said domain wall using a spin-polarised current. In this thesis, a candidate geometry for a LSMO nanowire that allows for the creation of a domain wall and subsequent manipulation by current of that domain wall is determined using micromagnetic simulations. Different geometries and strain axes were investigated using field sweeps. Both a transverse and a vortex domain wall were identified from these field sweeps and were then tested by applying current. It was determined that a continuous current density applied along the easy axis of the nanowire with a 20 nm thickness to a vortex domain wall, with a 7 mT external field along the same axis resulted in the domain wall being pushed past the notch. If reproduced experimentally, this would bring us one step closer to creating magnetic spin-based logic and storage devices.Show less
We used modern clean room technologies to produce thin nanopatterned superconductors in an aim to increase their critical temperature. These experiments are based on existing simulations which...Show moreWe used modern clean room technologies to produce thin nanopatterned superconductors in an aim to increase their critical temperature. These experiments are based on existing simulations which indicate that a large change in the electron-phonon coupling parameter lambda is attainable. The simulations were explored in an effort to find an optimal hole geometry and an attempt was made to extend them to a hexagonal lattice of atoms. We obtained ~50nm circular holes spaced 120nm on both MoGe and NbSe2 while also producing contacts to measure these small structures.Show less
