Domain processes of four magnetic thin film systems

This thesis is mainly concerned with the domain processes observed during in-situ magnetising experiments carried out on four ferromagnetic thin film systems. Three of these systems have been developed with commercial applications in mind and the aim of studying them was to evaluate their suitability for these applications. The fourth system is a novel thin film system, which has been developed in order to test some fundamental suppositions of the theory of magnetism. Most of the experiments carried out on these samples were performed on the modified JEOL 2000FX and the modified Philips CM20 at the University of Glasgow. Use was also made of the JEOL 1200 at the University of Glasgow. (author)